24V Single Colour COB LED Strip

24V single colour COB strip is the standard specification for residential runs under 10 metres — kitchen under-cabinet lighting, bedroom cove details, display shelving, and stairwell accents. Available in both IP20 (indoor) and IP67 (outdoor/wet zone), with up to 20 metres from a single feed point on both ratings. We cut every 24V reel bespoke to your length before dispatch at marked intervals of 25mm, so a 2.85m shelf run ships as one piece ready to stick down. CRI90+, 7-year warranty, free UK delivery from Telford. For installations where exact length falls between standard cut marks, three FreeCut COB LED Strip products (480-chip IP20) are also available in this collection — they cut at any point along the strip. Non-dimmable IP67 power supplies, triac dimmable drivers, and Miboxer, Skydance, or Ltech controllers are all available.

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24V single colour COB strip is the standard specification for residential runs under 10 metres — kitchen under-cabinet lighting, bedroom cove details, display shelving, and stairwell accents. Available in both IP20 (indoor) and IP67 (outdoor/wet zone), with up to 20 metres from a single feed point on both ratings. We cut every 24V reel bespoke to your length before dispatch at marked intervals of 25mm, so a 2.85m shelf run ships as one piece ready to stick down. CRI90+, 7-year warranty, free UK delivery from Telford. For installations where exact length falls between standard cut marks, three FreeCut COB LED Strip products (480-chip IP20) are also available in this collection — they cut at any point along the strip. Non-dimmable IP67 power supplies, triac dimmable drivers, and Miboxer, Skydance, or Ltech controllers are all available.

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Every 24V COB strip in this collection delivers CRI90+ colour rendering, a completely dot-free light line, and a 7-year warranty backed by UK-held stock. Available in 2700K warm white through to 6500K cool white, with wattages from 5W/m for accent work up to 20W/m for task and commercial lighting. Free UK delivery on 97% of products.

24V COB  ·  CRI90+  ·  cut to length at marked intervals  ·  Up to 20m Single Feed  ·  2700K–6500K  ·  7-year warranty  ·  Free UK Delivery

  1. Which colour temperature suits your space?
  2. What wattage per metre do you need?
  3. How far can you run 24V COB strip on one feed?
  4. What driver do you need for 24V COB strip?
  5. How do you dim single colour 24V COB strip?
  6. How do you install 24V COB LED strip?
  7. Where should you NOT use 24V COB strip?
  8. Why choose ATOM LED for 24V COB strip?
  9. Frequently asked questions — single colour COB LED strip 24V

Quick decision summary: If you need a clean, dot-free light line for kitchens, bedrooms, or retail displays under 20 metres total length, 24V single colour COB strip is the right choice. For runs over 20 metres or large commercial spaces, consider 48V single colour COB strip instead.

Who this is for: Electricians, kitchen fitters, interior designers, and homeowners fitting under-cabinet lighting, cove lighting, display case illumination, wardrobe lighting, or bathroom task lighting in 2026 projects.

Who this is NOT for: If you need colour-changing effects, you need RGBW COB strip. If your single run exceeds 20 metres, move to 48V. If you need full outdoor weatherproofing, see the outdoor-rated COB strip collection.

Common buying mistakes to avoid:

  • Choosing 12V for long runs: Voltage drop on 12V becomes visible after approximately 3 metres, making 24V significantly more practical for kitchen and cove runs in most 2026 installations.
  • Oversizing wattage: Under-cabinet lighting rarely needs more than 10W/m — overpowering creates glare and excessive heat.
  • Using a leading-edge dimmer: Leading-edge dimmers cause flicker on most LED drivers; a trailing-edge dimmer typically costs around £15 and solves the problem entirely.

Which colour temperature suits your space?

Single colour COB LED strip 24V is available from 2700K warm white to 6500K cool white. Warm white (2700K–3000K) suits bedrooms, living rooms, and hospitality environments. Natural white (4000K) works well in kitchens and bathrooms. Cool white (5000K–6500K) is typically specified for garages, workshops, and commercial retail displays.

Colour Temperature Kelvin Range Best Applications Mood / Feel
Warm White 2700K–3000K Bedrooms, living rooms, restaurants, hotels Relaxed, inviting
Natural White 3500K–4000K Kitchens, bathrooms, offices, retail Clean, balanced
Cool White 5000K–6500K Garages, workshops, task areas, commercial Bright, alert
  • 2700K warm white: The most popular choice for residential cove lighting and under-cabinet kitchen installations in 2026, delivering a tone similar to traditional halogen.
  • 4000K natural white: Preferred by kitchen designers who want accurate food colour rendering without the warmth shifting how worktops look.
  • 6500K cool white: Rarely used in homes but standard in workshop and commercial display applications where maximum visibility matters.

What wattage per metre do you need?

For accent and mood lighting, 5W/m to 8W/m provides a soft glow suitable for cove details, shelving, and bedroom headboards. Task lighting in kitchens and bathrooms typically requires 10W/m to 14W/m. Commercial and display applications may need 16W/m to 20W/m for high-output illumination across larger surfaces.

More watts means more light and more heat — which is why every COB strip should be mounted on an aluminium profile for heat dissipation.

Application Recommended W/m Typical Lumens/m Heat Management
Accent / mood 5–8W/m 400–650 lm/m Profile recommended
Under-cabinet task 10–14W/m 800–1,100 lm/m Profile required
Commercial display 16–20W/m 1,200–1,600 lm/m Profile essential
  • Heat and lifespan: Higher wattage strips generate more heat per metre, and without an aluminium profile, the 3M adhesive backing degrades faster, particularly in enclosed spaces like pelmet recesses.
  • Driver headroom: Always size your 24V LED driver at 80% maximum load — a 5-metre run of 10W/m strip (50W total) needs a driver rated at approximately 63W minimum.

How far can you run 24V COB strip on one feed?

ATOM LED 24V single colour COB strip supports runs up to 20 metres from a single feed point. This is one of the longest single-feed distances available in the UK 24V market in 2026. Voltage drop is managed through higher copper content in the flexible PCB, keeping brightness consistent across the full 20-metre length.

  • Under 10 metres: Single feed from one end is standard practice, suitable for most kitchen and bathroom installations.
  • 10 to 20 metres: Single feed still works with ATOM LED 24V COB strip — no mid-point injection needed.
  • Over 20 metres: Consider 48V COB strip with 30-metre single feed, or use parallel wiring with a second feed point on 24V.

For runs approaching 20 metres at higher wattages (16W/m+), check voltage drop calculations with the ATOM LED technical team on 01952 370028 — they can confirm whether single feed or dual feed is the better approach for your specific layout.

What driver do you need for 24V COB strip?

Single colour 24V COB strip requires a constant voltage 24V DC driver. Calculate the total wattage of your strip run (length in metres multiplied by watts per metre), then select a driver rated at least 20% above that figure. For dimming installations, use a TRIAC dimmable driver paired with a trailing-edge dimmer.

  • Non-dimmable installations: A standard constant voltage 24V driver from the LED power supply range is the most cost-effective option for fixed-brightness applications.
  • Dimmable installations: Use a TRIAC dimmable 24V driver with a trailing-edge wall dimmer. Leading-edge dimmers frequently cause visible flicker — replacing with trailing-edge typically costs around £15.
  • Sizing example: A 4-metre run at 14W/m = 56W total load. Apply the 80% rule: 56W / 0.8 = 70W minimum driver rating. A 75W or 100W driver would be the correct choice.

24V 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. This classification means significantly reduced shock risk under dry conditions — making 24V the standard choice for residential installations in 2026.

How do you dim single colour 24V COB strip?

Dim single colour 24V COB strip using either a TRIAC dimmable driver with a trailing-edge wall dimmer, or a separate PWM dimmer placed between a non-dimmable driver and the strip. TRIAC dimming is the simpler option for new-build and renovation projects where a wall dimmer plate is already planned.

  • TRIAC dimming: The driver handles the dimming signal from a standard wall dimmer plate. Ensure the dimmer is trailing-edge; leading-edge types cause flicker on most LED loads.
  • PWM dimming: A PWM controller sits between the driver and strip. This method offers finer control and is typically used with smart home systems or dedicated LED controllers.
  • Smart home integration: PWM controllers from brands like MiBoxer and Skydance support app control, scheduling, and scene setting — useful for 2026 projects incorporating whole-house automation.

How do you install 24V single colour COB strip step by step?

Mount an aluminium profile along your surface, peel the adhesive backing, and press the strip into the channel. Connect to a 24V constant voltage driver sized at 120% of total wattage — a 5m run of 14.4W/m strip draws 72W, so fit a 90W driver minimum. Test for even brightness before clipping the diffuser cover. All mains wiring must comply with BS 7671.

Installing 24V single colour COB strip requires five core steps: planning your layout and driver position, preparing the mounting surface with an aluminium profile, connecting the strip to the driver, testing the full run before final mounting, and securing all connections. A competent DIYer can complete a typical kitchen installation in approximately 2 hours.

  1. Plan the layout and driver location: Measure the total strip length needed. Position the driver within reach of a fused spur or plug socket. Ensure the driver remains accessible for future maintenance — never seal it inside a closed void.
  2. Prepare the mounting surface: Fix an aluminium profile along the mounting line for heat dissipation and a flat adhesion surface. Never mount strip directly onto bare metal — this can cause short circuits across the exposed PCB traces.
  3. Attach the strip to the profile: Peel the 3M adhesive backing and press the COB strip firmly into the profile channel. Use cut to length at marked intervals points to trim to exact length — ATOM LED strips can be trimmed at the marked cut points without affecting the warranty. Never power the strip while it is still coiled on the reel, as heat builds up rapidly and can damage both the strip and adhesive.
  4. Wire the strip to the driver: Connect the strip's positive and negative leads to the driver output terminals. For runs approaching 20 metres, use parallel wiring from the driver to multiple strip sections rather than daisy-chaining in series, which multiplies voltage drop.
  5. Test before final fixing: Power up and check for even brightness across the entire run. Verify dimming operates smoothly if a dimmer is fitted. Confirm all connections are secure and the strip sits flat inside the profile.
  6. Fit the diffuser and secure: Clip the profile diffuser cover into place. Opal diffusers provide the smoothest light spread and hide the strip from direct view. Secure any loose wiring with cable clips rated for low-voltage DC circuits.

If you need help planning your installation, call the ATOM LED technical team on 01952 370028 (Monday to Friday, 9am–5pm) or email operations@atomled.co.uk.

Where should you NOT use 24V COB strip?

Standard IP20 rated 24V COB strip must not be used outdoors, in bathrooms within zones 0–2, in steam rooms or saunas, or in any location exposed to direct water contact. It must also not be mounted directly onto bare uninsulated metal surfaces, as exposed PCB traces can short circuit against conductive material.

  • Outdoor use: Unprotected IP20 strip degrades rapidly when exposed to moisture. Even IP65 (silicone-coated) strip is rated only for surface splashes and is not suitable for typical UK outdoor conditions under BS7671. For outdoor projects, use IP67 or IP68 rated outdoor COB strip.
  • Bathroom wet zones: Zones 0, 1, and 2 require a minimum of IP67 protection. IP20 strip is only suitable in bathroom zone 3 and above, outside the splash area.
  • Enclosed unventilated spaces: Fitting high-wattage strip inside sealed pelmets or behind fully enclosed panels without any airflow can cause heat build-up. Always allow some ventilation or use a profile with adequate thermal mass.
  • Direct metal contact: Never fix strip directly onto bare aluminium, steel, or copper surfaces without an insulating profile channel between the strip and the metal.

Why choose ATOM LED for 24V COB strip?

ATOM LED supplies 24V single colour COB strip from UK-held stock in Telford, Shropshire — not dropshipped from overseas warehouses. Every strip carries a 7-year warranty, CRI90+ colour rendering, and cut to length at marked intervals. The technical team is available Monday to Friday on 01952 370028 to help with sizing, wiring, and driver selection.

  • Cut technology: Cut at any marked point along the strip without voiding the warranty — no fixed cut intervals, no wasted length.
  • 20-metre single feed: Run up to 20 metres from one power point on 24V, reducing the number of drivers and wiring complexity in most residential projects.
  • CRI90+ across all strips: Colours appear true and accurate under ATOM LED COB strip — critical for kitchen worktops, retail displays, and anywhere colour fidelity matters.
  • 7-year warranty: Covers all COB DC voltage strip. Contact operations@atomled.co.uk for warranty enquiries.
  • Free UK delivery: Free UK delivery on 97% of products, typically arriving within 1–3 working days in 2026.
  • UK-based technical support: Not a call centre script — speak directly with the team who spec and test these products, Monday to Friday, 9am–5pm.

Bespoke cut to your length: we cut your 24V strip at the nearest 25mm interval before dispatch. Whether it’s a 1.4m shelf or a 9m corridor, you get one continuous piece with no waste and no connectors. Available in IP20 for dry interiors and IP67 for bathroom wet zones and covered outdoor areas. Triac dimmable drivers and non-dimmable IP67 power supplies in stock. For jobs where exact length falls between 25mm intervals, three FreeCut products (480-chip IP20) cut at any point. 7-year warranty on all 24V single colour COB products.

Frequently asked questions — 24V single colour COB strip

These are the most common questions the ATOM LED technical team receives about 24V single colour COB strip. Each answer is based on real installation experience and UK electrical standards current as of 2026.

Can you cut 24V COB strip to any length?

  • Yes. ATOM LED 24V COB strip uses cut to length at marked intervals, allowing cutting at any point without voiding the warranty or wasting material on custom-length installations.

Is 24V COB strip safe for domestic use?

  • Yes. 24V DC falls within the SELV voltage threshold under BS7671 when supplied from a suitably isolated, safety-rated driver. This classification means significantly reduced shock risk under dry conditions, making it the standard voltage for residential LED strip installations across the UK in 2026.

What is the difference between COB and SMD LED strip?

  • COB (Chip-on-Board) strip uses densely packed micro LEDs beneath a continuous phosphor layer, producing a smooth, dot-free light line. SMD strip uses spaced-apart LED packages that create visible hot spots. COB is the preferred technology for dot-free lighting in 2026 projects.

Do I need an aluminium profile with COB strip?

  • An aluminium profile is strongly recommended for all installations and essential for strips above 10W/m. The profile acts as a heatsink, extends lifespan, and protects the strip from physical damage. Browse the LED strip profile range for compatible options.

Can I use 24V COB strip in a bathroom?

  • Standard IP20 strip is only suitable for bathroom zone 3 and above (outside the splash area). For zones 0, 1, and 2, you need a minimum IP67 rating. Check the ATOM LED outdoor and IP-rated ranges for suitable bathroom-rated options.

How many metres of strip can one driver power?

  • This depends on the strip wattage and the driver rating. Divide the driver wattage by the strip's watts per metre, then reduce by 20% for safe headroom. Example: a 150W driver with 10W/m strip can safely power approximately 12 metres (150W x 0.8 = 120W / 10W/m = 12m).

What accessories do I need for a 24V COB strip installation?

  • At minimum, you need a 24V constant voltage driver, wire connectors, and an aluminium profile. For dimmable setups, add a trailing-edge dimmer or PWM controller. Browse the full COB strip accessories range for connectors, joiners, and mounting clips compatible with all ATOM LED strip.

Why is 24V better than 12V for most installations?

  • 24V strip experiences approximately half the voltage drop of 12V strip at the same wattage over the same distance. This means brighter, more consistent light output on longer runs. Most professional installers in 2026 specify 24V as the default for any run over 3 metres.

Can I connect multiple strips together?

  • Yes, using parallel wiring back to the driver. Never daisy-chain in series, as this multiplies voltage drop. Use solderless connectors or solder joints, keeping each section's wires running independently back to the driver terminals.

Does ATOM LED offer free delivery on 24V COB strip?

  • Yes. All ATOM LED orders ship free to mainland UK addresses, with typical delivery in 1–3 working days. Stock is held in the UK warehouse in Telford, Shropshire — not dropshipped from overseas. Call 01952 370028 or email operations@atomled.co.uk for urgent delivery queries.

Ready to order? Browse the full 24V single colour COB LED strip range above, or contact the ATOM LED technical team for help choosing the right strip, driver, and accessories for your project.

How does ATOM LED cut 24V COB strip to a bespoke length?

You specify the length in metres when you place your order. We cut at the nearest marked interval on the 24V PCB — every 25mm on 320-chip density strip, every 50mm on 480-chip models — and dispatch a single continuous piece. A 6.3m bedroom cove run arrives ready to peel and stick with no joins. The service is free on every order with no minimum length. Both IP20 and IP67 variants available.

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

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I used the channel on my recent project , I was told I needed the 10mm x 10mm for the flex I bought . But as I had to use 2 separate cut lengths of flex, it meant having a separate feed cable which I needed to hide , so I bought the 10mm x 18mm , his the cable behind the flex and then pushed the flex in flush to channel . Worked perfectly. However. The 10mm x 10mm is not quite deep enough once you put screws in it . It pushes flex out a bit . And also comes with no holes . So DIY is not straight forward , but having said that im pleased with the whole outcome , ATOM lighting is pretty good at making things brighter , sorry about that

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