COB LED Strip Lights

This parent collection covers every COB strip product in the 2026 ATOM LED range, including single colour, RGBW, addressable digital, and outdoor-rated options. Whether you are specifying for a residential kitchen or a 50-metre hotel corridor, use this page to identify exactly which sub-collection matches your project, then browse products with full technical data and free UK delivery on 97% of products.

CRI90+ all COB strip · cut to length at marked intervals at any point · 24V / 48V · Up to 30m single feed · 5-year warranty · Free UK delivery · 01952 370028

Quick decision summary

• Single colour white light for kitchens, coves, or retail: Choose dot-free COB strip in 24V or 48V and select your colour temperature at checkout.
• Colour-changing with clean white output: Choose RGBW COB strip with a dedicated RGB controller — never a standard dimmer.
• Individually addressable pixel and chase effects: Choose addressable digital RGB COB strip with an SPI controller.
• Outdoor garden, patio, or bathroom wet zone: Choose outdoor-rated COB strip at IP67 or IP68 — IP65 is surface-splash only and is not suitable for exposed UK outdoor conditions under BS7671.
• Not sure which voltage — need a side-by-side comparison: Start with the voltage comparison page covering 12V, 24V, and 48V.

Who is this page for?

• Buyers new to COB strip who want to understand the technology, compare options, and find the right sub-collection before ordering.
• Electricians and interior designers specifying COB strip for the first time who need a technical overview of the full range in one place.
• Architects and lighting consultants writing lighting schedules for 2026 projects who need to compare single colour, RGBW, and addressable options across voltage and IP rating.
• Commercial fit-out managers sourcing COB strip in bulk for hospitality, retail, or office refurbishment from a single UK supplier.

Who is this page NOT for?

• Buyers who already know their exact product type: Go directly to the relevant sub-collection — 24V single colour COB, 48V single colour COB, RGBW COB, or addressable digital COB.
• Anyone looking for LED neon flex: Neon flex is a completely different product format — see our LED neon flex collection instead.
• Buyers who need 240V AC mains strip: DC voltage COB strip is the professional choice for permanent hardwired installations — 240V AC strip should not be hardwired permanently in most residential applications.

Common buying mistakes to avoid

• Buying RGB strip when you also need white: Standard RGB strip cannot produce clean white light — it produces a cold, violet-tinged approximation. If you need both colour and white, RGBW COB strip with its dedicated white channel is the correct choice.
• Pairing a dimmable driver with RGBW or RGB strip: Colour-changing strip requires a non-dimmable constant voltage driver paired with a dedicated controller. Dimmable drivers cause flicker, colour shift, and premature failure.
• Choosing IP65 for a UK garden or bathroom: IP65 is rated for surface splashes only. For outdoor or bathroom wet zones, specify IP67 (temporary immersion) or IP68 (continuous submersion).
• Powering strip while still coiled on the reel: Heat builds rapidly in coiled strip, destroying adhesive backing and creating a potential fire risk. Always uncoil completely before powering on.
• Mounting strip on bare metal surfaces: Exposed copper tracks on the underside of COB strip short-circuit against uninsulated conductive surfaces. Always use an aluminium profile with an anodised or insulated channel, or apply insulation tape to the mounting surface.

On this page

1. What is COB LED strip and why has it replaced SMD in professional projects?
2. What types of COB LED strip does ATOM LED stock in 2026?
3. How do you choose the right COB strip for your project?
4. What makes COB strip lights better than SMD for architectural lighting?
5. How does voltage affect COB strip performance and run length?
6. What colour temperatures and CRI ratings are available?
7. How do you install COB LED strip lights correctly?
8. What IP rating do you need for indoor, outdoor, and bathroom COB strip?
9. How do you dim and control COB LED strip?
10. What accessories do you need for a complete COB strip installation?
11. Why do UK professionals choose ATOM LED for COB strip lights?
12. Frequently asked questions about COB LED strip lights

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What is COB LED strip and why has it replaced SMD in professional projects?

COB (Chip-on-Board) LED strip mounts hundreds of tiny LED chips directly onto a flexible circuit board under a single continuous phosphor layer, producing a completely dot-free line of light. Unlike SMD strip where individual diodes create visible bright spots and dark gaps, COB strip delivers smooth, uniform illumination that looks professional even without a diffuser — which is why it has become the default specification for architectural and high-end residential projects across the UK in 2026.

The practical difference between COB and SMD strip is visible the moment you power them side by side. SMD strip uses individually packaged LED diodes — typically 2835, 3528, or 5050 sizes — soldered at intervals along the flexible PCB. At close viewing distances, each diode appears as a distinct bright dot separated by a darker gap. This dotting effect is acceptable when strip is fully concealed behind deep frosted diffusers, but it becomes a visible defect in any exposed or semi-recessed application.

COB strip eliminates dotting entirely. Instead of individual diode packages, bare LED chips are placed at extremely high density — typically 320 to 840 chips per metre — and covered with a continuous phosphor coating. The light blends before it leaves the strip surface, creating a smooth, unbroken line of illumination with no hotspots at any viewing distance.

• Dot-free light output: COB strip produces a continuous glow that looks like a solid line of light rather than a row of individual dots, making it suitable for open shelving, glass displays, and exposed cove details where strip is directly visible.
• Reduced dependence on diffusers: Because the phosphor layer blends light at source, you can use shallower aluminium profiles or even mount without a diffuser entirely, reducing both material costs and installation depth in 2026 fit-outs.
• Higher LED density: With 320 to 840 chips per metre compared to 60 to 120 diodes on typical SMD strip, COB distributes heat more evenly across the PCB surface and provides more uniform light distribution per unit length.
• Thinner, more flexible PCB: COB strip construction is inherently thinner than SMD because it does not require individual plastic-packaged diodes, making it easier to bend around gentle curves and fit into narrow profile channels.
• CRI90+ as standard: Every COB strip in the ATOM LED range meets or exceeds CRI90, meaning colours in your space render accurately under the light — critical for kitchens, retail displays, hospitality, and any environment where visual accuracy affects the experience.

The shift from SMD to COB is not a marketing trend. It reflects a genuine engineering improvement in how LED strip distributes and blends light. In 2026, most UK lighting designers, electrical contractors, and architects specify COB strip as the default for any application where the strip itself — or its reflection — may be visible. SMD strip remains a valid budget choice for fully concealed backlighting, but COB is the professional standard for exposed, architectural, and high-specification work.

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What types of COB LED strip does ATOM LED stock in 2026?

ATOM LED stocks four main types of COB strip in 2026: single colour (warm, natural, and cool white in 24V and 48V), RGBW colour-changing with a dedicated white channel, addressable digital RGB with individual pixel control, and outdoor-rated IP67/IP68 variants for gardens, bathrooms, and commercial exteriors. Every type ships at CRI90+ with cut to length at marked intervals and a 5-year warranty.

Each type serves a distinct application. Choosing the wrong category means either paying for features you do not need or missing capabilities your project requires. The table below maps each type to its primary use case so you can narrow your search before browsing individual products.

COB Strip Type	Best Application	Voltage Options	Control Method	Browse Collection
Single colour (warm/natural/cool white)	Kitchens, coves, retail, task lighting	24V, 48V	Trailing-edge dimmer or 0-10V	Dot-free COB strip
RGBW colour-changing	Hospitality, entertainment, feature walls	24V	Dedicated RGB/RGBW controller	RGBW COB strip
Addressable digital RGB	Signage, architectural effects, stage	24V	SPI pixel controller	Addressable COB strip
Outdoor IP67/IP68	Gardens, patios, bathrooms, facades	24V, 48V	Varies by type	Outdoor COB strip

Single colour COB strip

Single colour is the most commonly specified type, covering approximately 70% of UK COB strip installations in 2026 projects. You select one fixed colour temperature at purchase — warm white (2700K-3000K), natural white (3500K-4000K), or cool white (5000K-6500K) — and it produces that colour across its full length. Available in both 24V for residential runs up to 20 metres and 48V for commercial runs up to 30 metres single feed, with dual-feed options extending to 50 metres on 48V.

RGBW colour-changing COB strip

RGBW COB strip combines red, green, blue, and a dedicated white LED channel in a single dot-free strip. The dedicated white channel is the key difference between RGBW and standard RGB. Standard RGB cannot produce clean white light — it generates a cold, violet-tinged approximation that looks noticeably artificial in residential and commercial settings. RGBW solves this with a separate warm or natural white chip that produces proper white independently. RGBW requires a non-dimmable constant voltage driver paired with a dedicated RGBW controller — never a dimmable driver.

Addressable digital RGB COB strip

Addressable COB strip gives you individual control over each pixel or small group of pixels, enabling chase sequences, colour-gradient effects, and dynamic patterns that standard RGBW cannot achieve. Each pixel has its own integrated IC (driver chip) and is controlled via an SPI signal from a compatible digital pixel controller. This type is specified for signage, stage lighting, architectural feature installations, and anywhere dynamic lighting effects are required.

Outdoor-rated COB strip (IP67 and IP68)

Outdoor COB strip is protected with either silicone tubing (IP67) or full potting compound (IP68) to withstand UK weather conditions, ground-level moisture, and direct water exposure. IP67 handles temporary immersion and suits most garden, patio, and bathroom applications. IP68 withstands continuous submersion and is specified for ponds, fountains, and fully exposed external positions. IP65 provides surface-splash protection only and is not suitable for UK outdoor conditions or bathroom wet zones under BS7671 regulations.

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How do you choose the right COB strip for your project?

Start with three questions: what colour of light do you need (fixed white or colour-changing), how long is your longest run in metres, and is the strip going indoors or outdoors. These three answers eliminate approximately 80% of the range and direct you to the correct sub-collection within two minutes. The decision tree below walks through each step so you order the right product first time.

Most specification errors happen because buyers start by looking at products instead of answering these foundational questions. A 48V single colour strip and a 24V RGBW strip look almost identical on a product listing page, but they serve completely different purposes and require different drivers, controllers, and installation approaches.

Step 1 — Colour requirement

• Fixed white light only (warm, natural, or cool): You need single colour COB strip. Proceed to step 2.
• Colour-changing RGB plus clean white: You need RGBW COB strip. Proceed to step 3.
• Dynamic pixel effects, chase patterns, or individually controlled segments: You need addressable digital RGB COB strip. Your voltage will be 24V, and you will need an SPI controller. Browse the addressable COB collection.

Step 2 — Run length and voltage (single colour)

• Total run under 20 metres from the driver: 24V is the standard specification for most residential and light-commercial projects. Driver choice is widest in 2026 at this voltage.
• Total run 15 to 30 metres single feed: 48V halves voltage drop compared to 24V over the same distance, delivering consistent brightness from end to end. This is the correct choice for corridors, retail runs, and architectural features.
• Total run 30 to 50 metres: 48V with dual-feed wiring (powered from both ends) covers up to 50 metres. For runs exceeding 50 metres, split into separate driver circuits.

Step 3 — Environment and IP rating

• Indoor, dry locations: IP20 (uncoated) is suitable for kitchens, bedrooms, living rooms, and commercial interiors with no moisture exposure.
• Bathrooms, covered porches, or areas with occasional moisture: IP67 provides temporary immersion protection and suits most bathroom zones and covered outdoor positions.
• Fully exposed outdoor, ponds, or fountains: IP68 withstands continuous submersion and is the correct specification for exposed UK weather, water features, and ground-level landscape lighting.

Once you have answered all three questions, use the sub-collection links in the table above to browse products that match your specification. If your project involves mixed requirements — for example, single colour in the kitchen and RGBW in the living room — you can combine different COB strip types on separate driver circuits within the same installation. Call the ATOM LED technical team on 01952 370028 if you need help building a specification across multiple zones.

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What makes COB strip lights better than SMD for architectural lighting?

COB strip outperforms SMD in architectural applications because it eliminates visible LED dots, allows shallower profile depths, provides higher CRI colour accuracy, and produces a more even light distribution across tight curves and complex geometries. In 2026, UK architects and lighting designers specify COB as the default for any installation where strip is visible, reflected in glass, or viewed at close range.

Architectural lighting demands a higher standard than concealed backlighting. When strip is mounted inside a floating ceiling cove, along a staircase handrail, beneath a glass balustrade, or inside a display cabinet, both the light line and any imperfections are on full display. COB strip meets these demands where SMD falls short.

Architectural Requirement	COB Strip Performance	SMD Strip Performance
Dot visibility at 300mm viewing	No visible dots — continuous line	Individual dots clearly visible
Minimum profile depth required	Approximately 7mm with clear cover	Approximately 15mm with frosted cover
CRI (ATOM LED range)	CRI90+ across all models	CRI80-CRI90 depending on model
Flexibility around 50mm radius curves	Follows curves smoothly — thinner PCB	May kink or lift — thicker component profile
Reflection quality in glass or polished surfaces	Clean, even reflection line	Dotted reflection pattern visible
Heat distribution per metre	Spread evenly across full chip area	Concentrated at each individual diode

• Glass-fronted cabinets and retail displays: When COB strip sits behind glass, the reflection on the glass surface shows a clean, continuous line. SMD strip creates a dotted reflection that draws the eye to the lighting rather than the displayed product.
• Floating ceilings and shadow-gap details: Architects increasingly specify COB strip inside narrow shadow gaps (10-15mm) where there is no room for a deep diffuser. The dot-free output means even a clear-cover profile delivers a uniform glow without hotspotting.
• Staircase lighting and handrails: In residential and commercial staircase installations, the strip is often visible at eye level or through glass balustrades. COB strip eliminates the distracting dot pattern that SMD creates at these short viewing distances.
• Hospitality and restaurant fit-outs: CRI90+ colour rendering ensures that food, drink, furnishings, and guest skin tones all appear natural under the light, which is a specification requirement for most 2026 hospitality projects.

The cost difference between COB and SMD strip per metre has narrowed considerably over the past two years. In most 2026 projects, the saving from using shallower profiles and spending less time on diffuser selection offsets the slightly higher strip price, making COB the more cost-effective choice for architectural work when you factor in total installation cost.

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How does voltage affect COB strip performance and run length?

Voltage directly determines how far you can run COB strip from a single driver feed point before brightness drops below acceptable levels. 24V supports runs up to 20 metres single feed and is the standard residential specification. 48V supports runs up to 30 metres single feed — with half the voltage drop of 24V over the same distance — and handles dual-feed runs up to 50 metres, making it the professional choice for commercial and architectural installations.

Voltage drop is the unavoidable loss of electrical pressure as current flows through the strip's copper tracks over distance. The further the electricity travels from the feed point, the dimmer the strip becomes. This is a physics constraint, not a product defect. Your job during specification is to select a voltage that keeps the brightness variation within acceptable limits — typically under 10% — across the full length of your run.

• 24V residential standard: The ATOM LED 24V range supports single-feed runs up to 20 metres with acceptable brightness consistency. This voltage has the widest choice of compatible drivers and dimmers in the UK market in 2026, making it the easiest to specify and source for residential projects.
• 48V commercial and architectural: At the same wattage and distance, 48V strip draws half the current of 24V, which means the voltage drop occurs at approximately half the rate. A 20-metre run on 48V shows roughly the same drop as a 10-metre run on 24V. For corridors, hotel hallways, retail perimeters, and architectural cove lighting over 15 metres, 48V is the correct specification.
• 48V and SELV classification: 48V DC falls within the SELV voltage threshold under BS7671 (120V DC ripple-free maximum), provided it is supplied from a suitably isolated, safety-rated driver. SELV means significantly reduced shock risk under dry conditions — not zero risk. Your driver must be a safety-rated, isolated unit to maintain the SELV classification throughout the circuit.
• Parallel wiring best practice: For multi-run installations, always wire strip runs in parallel from the driver rather than in series. Series wiring multiplies voltage drop across each connected run, causing progressively dimmer output on each successive strip. Parallel wiring ensures each run receives the full driver voltage independently.

If you are unsure which voltage suits your project, the ATOM LED technical team can review your floor plan and recommend the correct specification. Call 01952 370028 or email operations@atomled.co.uk Monday to Friday, 9am to 5pm. For a detailed voltage-by-voltage comparison with cable sizing data and driver compatibility tables, see the dedicated 12V, 24V, and 48V COB strip comparison page.

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What colour temperatures and CRI ratings are available?

ATOM LED COB strip is available in three standard colour temperature ranges: warm white (2700K-3000K), natural white (3500K-4000K), and cool white (5000K-6500K). Every COB strip in the 2026 range ships at CRI90 or above, which means colours in your space render with near-daylight accuracy — a specification standard increasingly required by UK architects, retailers, and hospitality designers.

Colour temperature, measured in Kelvin (K), defines the warmth or coolness of white light. Lower values produce warmer, amber-toned light reminiscent of traditional incandescent bulbs. Higher values produce cooler, bluer light closer to midday daylight. Choosing the correct colour temperature is one of the most important decisions in any lighting project because it cannot be changed after installation without replacing the strip entirely.

• Warm white (2700K-3000K): The most popular choice for UK residential spaces in 2026. 2700K suits traditional and period-style interiors, while 3000K works well in modern kitchens and living areas. Both create a relaxed, welcoming atmosphere suitable for bedrooms, dining rooms, and hospitality venues.
• Natural white (3500K-4000K): The professional specification for kitchens, bathrooms, retail displays, offices, and galleries. 4000K renders food colours accurately on worktops, shows true fabric and product colours in retail, and provides balanced task visibility without the clinical feel of cool white.
• Cool white (5000K-6500K): Specified for workshops, garages, warehouses, laboratories, and commercial task areas where maximum visual clarity and contrast matter more than ambience. Not typically recommended for living spaces as it can feel harsh at high brightness levels.

CRI (Colour Rendering Index) is an independent measure of how accurately a light source renders the full spectrum of colours compared to natural daylight (CRI100). Many budget LED strips ship at CRI70 or CRI80, which makes reds appear muddy, skin tones look grey, and wood grain lose its warmth. At CRI90+, these colour distortions are eliminated, which is why every ATOM LED COB strip meets this threshold regardless of colour temperature or voltage. For retail, hospitality, and any environment where visual presentation affects commercial outcomes, CRI90+ is not optional — it is the minimum professional standard.

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How do you install COB LED strip lights correctly?

Correct installation of COB LED strip requires five key steps: planning your run and feed points, mounting an aluminium profile for heat management, connecting the strip to a compatible driver using parallel wiring, testing the circuit before final fixing, and sealing connections to the appropriate IP standard for your environment. Skipping any step risks dim sections, adhesive failure, or premature strip failure.

The steps below apply to all COB strip types — single colour, RGBW, and addressable. Specific driver and controller requirements vary by strip type, so check the product page for your chosen strip before purchasing components.

1. Step 1 — Plan your layout and feed points: Measure each run accurately and mark feed point locations. For 24V strip, plan a feed point within 20 metres of the furthest point. For 48V, you can feed up to 30 metres from a single point. Mark driver locations allowing for cable routing and ventilation. For runs over 20 metres on 24V or over 30 metres on 48V, plan dual-feed wiring from both ends or split into separate driver circuits.
2. Step 2 — Mount the aluminium profile: Fix your chosen LED strip aluminium profile along the mounting surface using the manufacturer's mounting clips or adhesive. The profile serves two functions: it acts as a heatsink to draw heat away from the strip, and it provides a clean, straight mounting channel. Never mount COB strip directly onto bare metal without an insulated profile — exposed copper tracks on the strip underside will short-circuit against uninsulated conductive surfaces.
3. Step 3 — Cut, connect, and lay the strip: Uncoil the strip completely from the reel before powering — never test or run strip while it is coiled, as heat builds rapidly and destroys the adhesive. Cut the strip to length using the marked cut points. With ATOM LED cut to length at marked intervals, you trim at the marked cut points without voiding your 5-year warranty. Peel the adhesive backing and press the strip firmly into the profile channel. Connect the strip to your driver using soldered connections or compatible COB strip connectors and accessories.
4. Step 4 — Wire the driver and test: Connect the driver to the mains supply according to the manufacturer's wiring diagram. All mains wiring must be carried out by a competent person in accordance with BS7671 regulations. Before fixing the profile cover, power on the circuit and check for even brightness across the full length. Use a multimeter to verify voltage at the far end of the run — if it drops below 90% of the rated voltage, add a second feed point or shorten the run.
5. Step 5 — Fit the diffuser and commission: Clip or slide the profile diffuser cover into place. For dimmable installations, test the dimmer across its full range to check for smooth dimming without flicker. If you experience flicker, check that you are using a trailing-edge dimmer — leading-edge dimmers frequently cause flicker with LED drivers. A trailing-edge dimmer replacement typically costs approximately 15 pounds and resolves most residential dimming issues. For outdoor or wet-area installations, seal all connections to the IP rating required for your environment.

If your installation involves multiple zones, different strip types, or complex driver calculations, the ATOM LED technical team provides free specification support. Call 01952 370028 or email operations@atomled.co.uk with your project details and measurements.

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What IP rating do you need for indoor, outdoor, and bathroom COB strip?

IP20 (uncoated) suits dry indoor locations. IP67 handles temporary immersion and covers most UK outdoor garden installations and bathroom wet zones. IP68 withstands continuous submersion for ponds, fountains, and fully exposed external positions. IP65 is rated for surface splashes only and is not suitable for UK outdoor conditions or bathroom wet zones under BS7671 — this is one of the most common specification errors in LED strip projects.

IP (Ingress Protection) ratings are defined by the international standard IEC 60529 and describe how well an enclosure protects against solid particles and water. The two-digit number breaks down as follows: the first digit (0-6) rates solid protection, and the second digit (0-9) rates water protection. For LED strip, the second digit is the critical factor because moisture and water are the primary environmental threats.

IP Rating	Water Protection Level	Suitable Applications	Not Suitable For
IP20	None — open circuit board	Dry indoor: kitchens, bedrooms, offices, retail	Any moisture exposure
IP65	Surface splash only (low-pressure jets)	Covered indoor areas with occasional splash risk	UK outdoor, bathrooms, wet zones
IP67	Temporary immersion (up to 30 min at 1m depth)	Gardens, patios, bathroom zones, covered outdoor	Permanent submersion
IP68	Continuous submersion (rated depth varies)	Ponds, fountains, fully exposed outdoor, ground level	High-pressure wash-down
IP69	High-pressure, high-temperature wash-down	Commercial kitchens, food processing areas	General domestic use (overspecified)

• The IP65 misconception: Many UK suppliers market IP65 strip as "outdoor rated" or "Waterproof," which is misleading. IP65 protects against low-pressure surface splashes — it does not protect against pooling water, driving rain, condensation inside enclosures, or any scenario where water can sit against the strip. For reliable UK outdoor performance through autumn and winter weather, IP67 is the minimum sensible specification.
• Bathroom zone regulations: BS7671 wiring regulations define specific zones in bathrooms based on proximity to water sources. In Zone 1 (above the bath or shower to 2.25m height) and Zone 2 (extending 0.6m beyond Zone 1), IP67 is the minimum rating for LED strip in 2026 installations. IP65 does not satisfy the requirements for these zones.
• Outdoor landscape and garden lighting: For UK garden paths, decking edges, raised planter lighting, and patio features, outdoor-rated COB strip at IP67 or IP68 handles the ground-level moisture, frost, and seasonal weather conditions that British climates deliver. For in-ground or water feature applications, IP68 is the correct choice.

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How do you dim and control COB LED strip?

Single colour COB strip dims using a trailing-edge mains dimmer with a compatible dimmable driver, or via a low-voltage PWM dimmer on the 24V/48V side. RGBW and RGB COB strip requires a dedicated colour controller paired with a non-dimmable constant voltage driver — never a dimmable driver. Using the wrong dimming method causes flicker, colour shift, buzzing, or premature driver failure.

Dimming method depends entirely on which type of COB strip you are installing. The rules are different for single colour and colour-changing strip, and mixing them up is one of the most common causes of post-installation problems reported to our technical team.

Dimming single colour COB strip

• Option 1 — Trailing-edge mains dimmer + dimmable driver: This is the most common residential setup in 2026. A trailing-edge dimmer replaces your wall switch and sends a dimmed mains signal to a TRIAC dimmable LED driver, which converts it to the correct DC voltage for the strip. Trailing-edge dimmers are compatible with most LED drivers. Leading-edge dimmers frequently cause flicker — a trailing-edge replacement costs approximately 15 pounds and resolves the issue.
• Option 2 — Non-dimmable driver + low-voltage dimmer/controller: A non-dimmable driver provides constant voltage, and a separate low-voltage controller between the driver and strip handles dimming on the DC side. This approach gives smoother dimming performance and is preferred for commercial installations where precise dim levels matter.
• Option 3 — 0-10V or DALI driver: For commercial building management systems, 0-10V or DALI protocol drivers accept control signals from a central system. This is the specification standard for office fit-outs, hotels, and retail chains with centralised lighting control in 2026.

Controlling RGBW and RGB COB strip

• Mandatory: non-dimmable constant voltage driver. RGBW and RGB strip must be powered by a non-dimmable driver. Dimmable drivers cause flicker, colour shift, and premature failure when paired with colour-changing strip because the driver's dimming circuitry interferes with the controller's own PWM colour mixing.
• Mandatory: dedicated RGB or RGBW controller. The controller sits between the driver and the strip, independently varying the red, green, blue, and white channels to produce your chosen colour and brightness. Browse LED controllers for compatible options including MiBoxer, Skydance, and Ltech systems.
• Addressable digital strip: Requires an SPI pixel controller, not a standard RGB controller. Browse digital pixel SPI controllers for compatible units.

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What accessories do you need for a complete COB strip installation?

A complete COB strip installation typically requires five categories of accessories beyond the strip itself: an LED driver or power supply matched to your strip voltage and total wattage, an aluminium profile for heat management and mounting, connectors or soldering equipment for strip-to-wire joins, a dimmer or controller matched to your strip type, and appropriate cables sized for your run length and current draw.

Underspecifying accessories is a common cause of installation problems. A driver that is too small overheats and fails. A profile that is too shallow restricts airflow and shortens strip lifespan. Connectors that are not rated for your voltage and current introduce resistance and create hot joints. Plan your full accessory list before ordering strip.

• LED drivers and power supplies: Calculate your total wattage by multiplying the strip's watts-per-metre by your total run length, then add 20% headroom. A driver running above 80% of its rated capacity overheats and has a shorter lifespan. Browse the full LED driver range, or go directly to 24V drivers or 48V drivers if you know your voltage.
• Aluminium profiles: Profiles provide heat dissipation, physical protection, a straight mounting channel, and an optional diffuser cover. For COB strip, even a clear-cover profile produces excellent results because the dot-free output does not need a heavy frosted diffuser to look good. Browse aluminium profiles for LED strip or silicone profiles for curved and flexible applications.
• Connectors and accessories: Soldered connections are the most reliable, but solderless clip connectors save time on residential projects. Ensure any connector is rated for your strip voltage and width. Browse COB strip accessories for compatible connectors, extension cables, and mounting clips.
• Dimmers and controllers: Match to your strip type as described in the dimming section above. Single colour strip uses a dimmer. RGBW uses an RGBW controller. Addressable digital uses an SPI controller.

If you are unsure about any component in your specification, the ATOM LED technical team reviews accessory lists and driver calculations at no charge. Call 01952 370028 or email operations@atomled.co.uk.

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Why do UK professionals choose ATOM LED for COB strip lights?

UK electricians, interior designers, and architects specify ATOM LED because the entire COB range ships from UK stock in Telford with CRI90+ as standard, cut to length at marked intervals on every reel, a 5-year warranty on all DC voltage COB products, free delivery, and a technical support team available on 01952 370028 Monday to Friday, 9am to 5pm. This combination of product quality, stock availability, and technical support is difficult to match from a single UK supplier.

• Cut technology: Every ATOM LED COB strip can be trimmed at the marked cut points without voiding the warranty. Most competitors restrict cuts to wider intervals — typically every 25mm, 50mm, or 100mm — forcing installers to either waste strip or accept an imprecise fit. cut to length at marked intervals means your cut aligns with your installation, not the manufacturer's PCB layout.
• CRI90+ across the full range: Not just on selected products or premium lines. Every single colour, RGBW, and addressable COB strip in the 2026 ATOM LED range meets or exceeds CRI90, ensuring consistent colour accuracy regardless of which product you specify.
• Maximum single-feed run lengths: Up to 20 metres on 24V single colour, up to 30 metres on 48V single colour, and up to 50 metres with dual-feed on 48V. These are among the longest single-feed specifications available from a UK-stocked supplier in 2026.
• 5-year warranty on all DC voltage COB strip: Covers manufacturing defects, LED failure, and adhesive issues under normal use conditions. The warranty is backed by ATOM LED Lighting Ltd (Company No. 12128771) from our permanent UK premises, not a temporary marketplace listing.
• UK stock, not dropshipped: Every product ships from our warehouse at Unit D4, Stafford Park 4, Telford, Shropshire, TF3 3BA. Orders placed before 2pm on weekdays typically dispatch the same day with free UK delivery and 1 to 3 day arrival.
• Technical support from people who understand the products: Our Telford team handles driver calculations, specification reviews, and installation guidance by phone (01952 370028) and email (operations@atomled.co.uk) Monday to Friday, 9am to 5pm. We do not operate a generic call centre — your query reaches someone who works with these products daily.

Cut to length before dispatch: specify any length to the metre and we cut to order at the correct marked interval. You receive a single continuous strip with no joins, no offcuts, and no DIY cutting. Free on every order. For exact lengths between standard intervals, our three FreeCut COB LED Strip products (24V 480-chip IP20) cut at any point along the strip.

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Frequently asked questions about COB LED strip lights

Below are the 16 most common questions our technical team receives about COB LED strip, answered in clear bullet-point format with the specific technical details you need to make a confident purchasing or specification decision for your 2026 project.

1. What does COB stand for in LED strip?

• COB stands for Chip-on-Board. It describes a manufacturing method where individual LED chips are mounted directly onto the flexible circuit board and covered with a continuous phosphor layer, rather than being individually packaged in plastic housings like SMD (Surface-Mounted Device) LEDs.

2. Can you see individual LED dots on COB strip?

• No. The continuous phosphor layer blends light from hundreds of closely packed chips, producing a smooth, dot-free line of light with no visible hotspots. This is the primary visual advantage over SMD strip, especially at close viewing distances.

3. Is COB strip brighter than SMD strip?

• Brightness depends on wattage per metre, not the technology type. A 14W/m COB strip and a 14W/m SMD strip produce comparable lumen output. The difference is in light distribution — COB distributes lumens more evenly across the strip surface, while SMD concentrates output at each individual diode.

4. What is cut to length at marked intervals?

• cut to length at marked intervals allows you to cut ATOM LED COB strip at any point along its length without voiding the 5-year warranty. Standard LED strip from most manufacturers restricts cuts to fixed intervals, forcing installers to waste material or accept imprecise lengths. cut to length at marked intervals eliminates this limitation.

5. What CRI rating do ATOM LED COB strips have?

• CRI90+ across every COB strip in the 2026 range. This applies to all single colour, RGBW, and addressable models regardless of voltage, colour temperature, or IP rating. CRI90+ means colours render with near-daylight accuracy under the light.

6. How far can you run COB strip from a single feed point?

• Up to 20 metres on 24V single colour. Up to 30 metres on 48V single colour. Up to 50 metres on 48V with dual-feed wiring from both ends. These figures apply to ATOM LED strip under normal conditions — actual limits may vary slightly depending on wattage per metre and ambient temperature.

7. Do COB strip lights need an aluminium profile?

• An aluminium profile is strongly recommended for all COB strip installations. The profile acts as a heatsink to extend strip lifespan, provides a straight mounting channel, and protects against physical damage. While COB strip can be mounted with adhesive alone on clean, smooth surfaces, a profile delivers better long-term results in nearly every application.

8. Can you use COB strip outdoors in the UK?

• Yes, provided you specify IP67 or IP68 rated outdoor COB strip. IP65 is rated for surface splashes only and is not suitable for UK outdoor conditions including driving rain, ground moisture, and frost. IP67 handles most garden and patio applications. IP68 is required for ponds, fountains, and fully exposed positions.

9. What driver do you need for COB LED strip?

• A constant voltage LED driver matched to your strip voltage (24V or 48V) with a wattage rating at least 20% above your total strip wattage. For dimmable single colour installations, use a TRIAC dimmable driver. For RGBW or RGB strip, use a non-dimmable constant voltage driver paired with a dedicated controller.

10. Why does my COB strip flicker when dimmed?

• The most common cause is a leading-edge dimmer switch. LED drivers work best with trailing-edge dimmers. Replacing a leading-edge dimmer with a trailing-edge model typically costs approximately 15 pounds and resolves the flicker in most residential installations. Also check that your driver's minimum load is met — some dimmers require a minimum wattage to function smoothly.

11. Can you join two pieces of COB strip together?

• Yes. Use soldered wire connections for the most reliable join, or solderless clip connectors for faster installation. Ensure the polarity is correct (positive to positive, negative to negative) and that both pieces are the same voltage and type. Browse compatible connectors in the COB strip accessories collection.

12. Is 48V COB strip safe to install?

• 48V DC falls within the SELV voltage threshold under BS7671 (120V DC ripple-free maximum), provided it is supplied from a suitably isolated, safety-rated driver. SELV classification means significantly reduced shock risk under dry conditions — it does not mean zero risk. All mains wiring to the driver must be carried out by a competent person in accordance with current wiring regulations.

13. Can you use COB strip in a bathroom?

• Yes, with the correct IP rating for each bathroom zone. BS7671 defines moisture zones in bathrooms. In Zone 1 (above bath or shower to 2.25m) and Zone 2 (extending 0.6m beyond Zone 1), specify IP67 rated COB strip as a minimum. IP20 uncoated strip is only suitable for Zone 3 and beyond, where no direct water exposure occurs.

14. What is the difference between RGB and RGBW COB strip?

• RGB strip mixes red, green, and blue to produce colours but cannot produce clean white light — it creates a cold, violet-tinged approximation. RGBW adds a dedicated white LED channel that produces proper warm or natural white independently of the colour channels. If you need both colour effects and clean white illumination, RGBW is the correct specification.

15. How long does COB strip last?

• Typical rated lifespan for quality COB strip is 30,000 to 50,000 hours at L70 (the point where brightness has declined to 70% of original output). Actual lifespan depends on operating temperature, driver quality, and whether the strip is mounted on an appropriate heatsink. Using an aluminium profile and operating the driver below 80% capacity are the two most effective ways to maximise lifespan.

16. Does ATOM LED offer free delivery on COB strip?

• Yes. Every order ships with free UK delivery from our Telford warehouse. Orders placed before 2pm on weekdays typically dispatch the same day, with delivery in 1 to 3 working days. The 5-year warranty and free delivery apply to every COB strip product in the 2026 range, with no minimum order value.

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Ready to order? Browse the full COB strip range online, call our Telford technical team on 01952 370028 (Monday to Friday, 9am-5pm), or email operations@atomled.co.uk for specification advice, driver calculations, or bulk pricing. Every order ships with free UK delivery, a 5-year warranty, and full technical support.

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Why choose ATOM LED for your LED lighting project?

ATOM LED is a UK-based LED lighting specialist stocking every product in our Telford warehouse. We do not dropship from overseas suppliers. Free UK delivery on 97% of products, with typical delivery in 1 to 3 working days, backed by a 5-year warranty on all COB DC voltage strip lights.

• Cut technology: Cut ATOM LED strip at any point without voiding the warranty — no need to find cut marks in tight spaces.
• CRI90+ on all COB strip: Colours render naturally under ATOM LED strip, making it suitable for kitchens, retail displays, and any application where colour accuracy matters.
• Technical team available Monday to Friday, 9am to 5pm: Call 01952 370028 or email operations@atomled.co.uk for help with voltage selection, driver sizing, IP ratings, and installation planning.
• UK stock, not dropshipped: Every product ships from our Telford warehouse. No overseas lead times, no customs delays, no uncertainty on delivery dates.
• 20m single feed on 24V, 30m on 48V: Longer single-feed runs than most UK competitors, reducing the number of drivers and feed points required in large installations.

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Does ATOM LED cut COB strip to a bespoke length before dispatch?

Every COB LED strip order leaves our Telford warehouse cut to your specified length at the nearest correct marked interval. Intervals vary by strip density — typically every 50mm on standard COB and every 25mm on high-density 528-chip models. You receive a single continuous run ready to install. No extra charge, no minimum length, no DIY cutting on site.

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Last reviewed: March 2026 — ATOM LED technical team, Telford, Shropshire. Specifications current as of 2026.

🏭 UK LED specialist, Telford, Shropshire  ·  ☎️ 01952 370028  ·  🚚 Free UK delivery on 97% of products

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What is a COB LED strip?

COB LED strip places 320 to 528 LED chips per metre directly onto a flexible circuit board under a single phosphor layer, producing one continuous line of light with no visible dots or gaps.

The phosphor coating converts each chip’s output into the target colour temperature — 2700K warm white, 4000K natural, or 6500K cool white. Because the chips sit edge to edge, brightness distributes evenly across the full width of the strip. CRI is 90+ as standard across every colour temperature ATOM LED stocks, meeting the CIBSE Code for Lighting threshold for retail, hospitality, and residential task areas.

Specify COB strip for any installation where the strip is visible at close range — kitchen coves, shelving, signage, and shallow aluminium profiles where SMD strip would show individual bright spots through the diffuser.

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COB vs SMD LED strip — what is the difference?

COB LED strip is the better choice when you need a smooth, dot-free line of light without relying on a deep diffuser to mask individual diodes. The chips sit under a shared phosphor layer at 320 to 528 per metre, so no single source is visible at any viewing distance. CRI 90+ comes as standard.

SMD strip spaces 60 to 120 individual LED packages per metre with visible gaps between them. It remains useful for lower-cost projects, hidden accent runs inside deep aluminium profiles, or task lighting above 1500 lm/m where raw brightness matters more than aesthetics.

For kitchens, shelves, cove lighting, retail displays, and hotel features, choose COB. For budget installs where the strip is fully concealed or diffused, SMD is sufficient.

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12V vs 24V vs 48V COB strip — which voltage do you need?

24V COB strip suits most residential and light commercial runs up to 10 metres from a single feed point, with 20 metres as the practical ceiling before voltage drop dims the far end visibly.

48V halves the current for the same wattage, so voltage drop occurs at roughly half the rate. A 48V strip at 10W/m holds consistent brightness across 25 metres from one feed. For hotel corridors, office ceiling coves, and retail perimeters above 15 metres, 48V eliminates mid-run power injection. 48V DC falls within the SELV threshold under BS 7671 (120V DC ripple-free maximum) when supplied from a suitably isolated driver, which simplifies installation in bathrooms and wet zones.

12V COB is limited to roughly 5-metre runs and exists primarily for automotive and marine applications. For UK building projects, specify 24V or 48V.

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IP20 vs IP67 vs IP68 COB strip — which IP rating do you need?

IP20 COB strip has an exposed circuit board and suits dry indoor environments only — kitchens, bedrooms, living rooms, and retail displays where no moisture reaches the strip.

IP67 is encased in UV-stable silicone tubing rated for temporary immersion under IEC 60529. It handles UK rain, garden decking edges, and bathroom wet zones in BS 7671 Zone 1 and Zone 2. The silicone sleeve adds roughly 2mm to the strip profile, so check aluminium channel depth before ordering. IP68 uses full potting compound for continuous submersion in ponds, fountains, and water features at up to 2 metres depth.

IP65 is splash-resistant only and is not adequate for UK outdoor conditions. ATOM LED does not stock IP65 in the outdoor range — only IP67 and IP68. For dry interiors, choose IP20. For anything exposed to weather or moisture, choose IP67 or IP68.

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Single colour vs RGBW vs addressable COB strip — which type do you need?

Single colour COB strip produces one fixed colour temperature and covers roughly 70% of UK residential and commercial installations. Wire it to a constant voltage driver with an optional trailing-edge dimmer — two connections, no controller needed.

RGBW adds red, green, and blue channels alongside a dedicated white LED, so one strip delivers both clean white light and saturated colour. Without that dedicated white channel, RGB-only strip produces a cold violet-tinged approximation that fails CRI standards in any living or retail space. RGBW needs a non-dimmable driver plus a Miboxer, Skydance, or Ltech RGBW controller.

Addressable (digital pixel) COB strip controls each segment independently via SPI protocol for chase effects, flowing gradients, and reactive colour zones. It is the most capable option and the most complex, requiring a dedicated pixel controller and a data line alongside the power rails. For static white or single-colour runs, choose single colour. For white plus accent colour, choose RGBW. For dynamic per-pixel effects, choose addressable.

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Which COB LED strip is best for your project?

For kitchen under-cabinet and cove lighting, specify 24V single colour warm white (2700K or 3000K) in IP20 at CRI 90+ — mount in a shallow aluminium profile with a frosted diffuser for an even wash across the worktop.

For garden decking and outdoor perimeters, specify IP67 in 24V for runs under 15 metres or 48V for longer stretches. IP68 suits ground-level installations where standing water collects. House the driver in a ventilated weatherproof enclosure rated to at least IP54.

For retail signage and dynamic window displays, specify addressable digital COB strip with SPI control — per-pixel colour and brightness programming is the defining capability. For hotel corridors above 15 metres, specify 48V single colour at 3000K to maintain consistent brightness from one feed point. For bar and lounge ceilings, specify RGBW so the same strip handles warm white service lighting and coloured accent scenes.

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