Decking LED Lights White 6x12mm IP67 24V 5cm cut 20m

The default 6x12mm decking specification. 5cm (50mm) cut intervals — the sweet spot between cut precision and continuous run length. 20 metres single-feed, 40 metres dual-end. 24V DC. This is the format we ship most often for typical residential and small-commercial decking projects.

Permanent IP67 silicone build. 120 LEDs per metre delivering up to 690 lumens through a 120° smooth beam. Designed for UK outdoor exposure year-round, with verified performance from -30°C to +50°C. Compatible with standard 24V LED drivers — most 24V drivers in our catalogue are sized to drive 20m+ in a single run.

Where 5cm sits best in the range

Standard decking perimeters: a typical 4m × 6m deck has roughly 20m of perimeter. One 24V 5cm reel covers it from a single corner driver — no need for parallel feeds, no voltage drop concerns.

Patio surrounds and pergolas: patio edge runs of 8-15m and pergola undersides up to 6m × 4m fit comfortably in the single-feed limit. Cut at every 5cm mark to match the patio slab grid.

Composite step systems: manufactured composite step kits use standard riser depths (95mm, 120mm, 145mm). All multiples of 5cm — perfect alignment with cut points and zero waste.

Mid-size garden borders: retaining wall capstones, raised bed perimeters, and pathway edges between 10m and 20m total length. The 20m reel is one continuous piece — no joins, no failure points.

Why 5cm vs other cuts

Versus 1cm: the 1cm format costs slightly more per metre and is useful only when you need sub-5cm precision (stair nosings, narrow boards under 200mm). For straight perimeter runs, 5cm is faster to install with fewer cut decisions.

Versus 48V 10cm: 48V is the long-run option for projects over 20m. Below 20m, 24V is simpler — driver compatibility is broader, the LED count per cut is denser at 24V, and the install matches the bulk of UK residential needs.

Install detail

Driver sizing for a full 20m reel: 20 × 9W = 180W draw. With the 1.2 multiplier you need 220W minimum. Use a 240W or 300W 24V Mean Well driver. Round up — never down.

Cut precision: 5cm marks are visible on the silicone. Cut only at the mark, not between. Self-cutting voids the IP67 seal. We seal end-caps free of charge if you ask before dispatch.

Bend radius: 15mm minimum horizontal. The flex is single-bend (horizontal plane only) — this is not a vertical-bend or dual-bend product.

Recommended accessories: our 6x12mm aluminium decking channels (clip-on style) double as heatsinks and protect the silicone from foot pressure. Channel + clip combination keeps the flex flush with the deck surface.

Compliance: install per BS7671 18th Edition. Low-voltage DC only — never connect to mains.

For family back gardens and entertaining patios

Britain's typical family back garden — patio, lawn, BBQ area, and shed combined — fits comfortably in a single 20m reel. The 5cm cut gives enough flexibility without slowing the install:

Rear patio surrounds: standard 4×6m or 5×7m rear patios with continuous edge lighting around three or four sides. One driver, one continuous line.

Lawn-to-patio borders: defining where the patio ends and the grass begins — particularly useful where children run between the two zones at dusk.

Outdoor kitchen and BBQ zones: ambient lighting around outdoor kitchens, pizza ovens, and built-in BBQ counters. The IP67 rating handles fat splatter and rain wash.

Garden room and summerhouse thresholds: light strips under garden room overhangs, summerhouse decking, or home-office shed bases — clearly delineating the structure at night.

Colour selection guide

2700K — warm amber. Best on cedar, oak, mahogany decking. Hospitality and ambient garden zones.

3000K — soft warm. The most ordered option in this range. Universal residential default.

4000K — neutral white. Modern grey composite, slate, light stone. Architectural finish.

6000K — daylight cool. Step lighting where visibility matters, commercial outdoor, security-led installs.

Need a different format?

Decking LED Lights 24V — 1cm cut, 15m: finer cut precision for stair nosings and boards under 200mm wide.

Decking LED Lights 48V — 10cm cut, 40m: doubles the single-feed run for projects over 20m.

Every order custom-cut to your exact length, IP67-sealed at the end, and dispatched ready to install.

4-year warranty. Free UK delivery on Mainland orders (2-3 working days). Designed in the UK.

Compatible profile: For a clean, flush tiled installation, use our Tile-In Aluminium Profile 6×12mm IP67 Neon Flex 1 metre & 2 Metre.