Professional 4mm High-Density COB LED Strip | 480 LEDs/m Precision Lighting

Technical Specifications

Precision Engineering for Cabinetry

The 4mm Professional Series is dimensionally engineered for perfect compatibility with mainstream aluminium profiles and cabinet channels. At exactly 4mm wide, the strip seats flush inside standard 4-5mm profile grooves — wide enough for robust double-sided 2oz copper traces and secure 3M adhesive bonding, yet narrow enough to vanish behind a frosted diffuser with no visible fixture. This dimensional precision eliminates the shimming, spacers and custom machining that wider strips demand, reducing installation time and material cost on every project. For joinery workshops, the 4mm format works directly with off-the-shelf profile accessories: U-channels, corner connectors, end caps and diffusers all fit without modification.

Premium Material & Life-span

Reliability at 4mm width begins with the substrate: a professional double-sided 2oz (35um) copper PCB. At just 5W/m, the double-sided copper spreads the modest thermal load laterally across the entire strip, so no single point overheats even inside enclosed aluminium channels or timber joinery. The 2oz copper halves resistive losses, keeping brightness uniform from feed point to far end, while the reinforced substrate remains dimensionally stable through cutting, bending and thermal cycling. The result is a 50,000-hour rated life with stable color and output — the longevity demanded by architects who specify lighting behind permanent joinery.

Architectural Application Showcase

The 4mm Professional Series delivers seamless, unbroken linear light across entire architectural spaces. In kitchen islands, a continuous run under the counter edge creates a crisp floating effect with no visible break at joints — the 480 LEDs/m COB output reads as a single luminous line. In walk-in wardrobes and dressing rooms, profile-mounted runs light shelf edges and garment rods with gallery-grade precision. For retail and hospitality, the strip draws clean continuous lines along ceiling coves, display perimeters and stair nosing, while custom furniture programs benefit from cut-to-length flexibility at 25mm/50mm units. Because the light source is invisible and the output is perfectly uniform, the effect is pure architecture: light without a fixture.

Precision Installation Guide

Installed correctly, the 4mm strip integrates invisibly into aluminium profile systems. (1) Cut at the marked 25mm (DC12V) or 50mm (DC24V) points with sharp scissors; offcuts remain functional. (2) Clean the 4-5mm aluminium channel with isopropyl alcohol and allow full drying. (3) Press the 3M 300LSE adhesive evenly with a soft roller for complete contact. (4) For embedded installations, slide the strip into the channel before terminating, then fit the frosted diffuser. (5) Terminate at cut ends with solderless clamp connectors or soldered links at the exposed copper pads. (6) Feed from both ends for runs above 8m at DC24V or 5m at DC12V. (7) Size the driver at 1.2x total wattage (metres x 5W/m) and use a 2kHz+ PWM dimmer for flicker-free operation.

Professional Sourcing FAQ

1. What defines the 4mm Professional Series?

A precision 4mm COB strip engineered for mainstream aluminium profiles and slim cabinetry, with 480 LEDs/m dot-free output, 5W/m efficiency, CRI > 90 and a professional double-sided 2oz (35um) copper PCB.

2. Why is the 4mm width ideal for aluminium profiles?

4mm seats flush inside standard 4-5mm profile grooves, matching off-the-shelf channels, corners, end caps and diffusers without modification — the dimensional sweet spot for professional installation.

3. Does 480 LEDs/m density matter at 4mm width?

Yes. At 4mm the light source sits close to the emitting surface; 480 LEDs/m keeps the pitch below the visual threshold, producing a continuous line even in open grooves and mirror reflections.

4. How does 5W/m protect enclosed installations?

The low power density keeps junction temperatures modest inside enclosed aluminium and timber structures, while the double-sided 2oz copper spreads heat laterally for uniform thermal performance.

5. What are the cutting rules?

Cutting Unit is 25mm for DC12V and 50mm for DC24V, with cutting marks clearly indicated on the strip. Cut only at marked points; offcuts remain fully functional and connectable.

6. Which voltage should I choose?

Choose DC24V for runs above 5m and thinner wiring; choose DC12V for short runs and finer 25mm cutting granularity. Always match the driver voltage to the strip.

7. What power supply do I need?

Metres x 5W/m plus 20% headroom. A 15m run needs a 90W certified constant-voltage driver. For dimming, select a driver supporting your protocol (PWM/TRIAC/0-10V/DALI).

8. Is the CRI consistent between batches?

Yes. Chips are binned before production and every batch is tested for flux, CCT and CRI, holding CCT within ±50K and CRI within ±1 at the same bin code.

9. What is the expected lifespan?

50,000 hours (L70) at rated voltage with correct mounting. The 5W/m load and double-sided copper keep junction temperatures low, preserving output and color stability.

10. Does the strip work in mirror and glass applications?

Yes — the COB construction reads as a continuous light line in mirror reflections, glass shelves and polished surfaces with zero visible dots.

11. Is the strip dimmable?

Yes — 0-100% with PWM (2kHz+ recommended), TRIAC with compatible driver, or 0-10V/DALI converters matched to the strip voltage.

12. What makes the double-sided 2oz copper PCB special?

Double-sided 2oz (35um) copper doubles the conductive cross-section, reducing voltage drop, improving heat spreading and boosting long-term reliability in tight enclosures.

13. Can the strip be used with smart control systems?

Yes. The low-current profile integrates with presence sensors, daylight sensors and app-controlled PWM dimming hubs; integration guidance is provided free.

14. Is a waterproof version available?

The standard version is IP20 for dry indoor use. Custom IP65 silicone-extruded versions are available for bulk orders.

15. What is the minimum order quantity for wholesale?

Standard MOQ is 50 reels (500m) with sample reels dispatched within 24-48 hours. Trial and stocking orders can be arranged.

16. What OEM customization options are available?

Custom CCT (2200K-6500K), custom CRI (90/95/97), custom lengths and reel sizes, private-label printing, custom connectors and packaging — with full technical documentation.

17. How does the 4mm strip perform in profile systems?

It slides into standard 4-5mm channels, works with off-the-shelf accessories, and maintains a clean light line through corners with corner connectors — ideal for architectural cove and perimeter runs.

18. Which certifications apply?

Strips are manufactured to CE, RoHS and UL-relevant requirements, with batch test reports covering flux, CCT and CRI available on request.

19. How should the strip be stored?

Store reels in original packaging at room temperature and low humidity. Unroll only the required length and avoid tight coils for extended periods.

20. Why choose LEDLetsGo for the 4mm Professional Series?

In-house COB manufacturing, strict binning and batch testing, flexible MOQ, fast lead times and dedicated engineering support — a complete sourcing partner for lighting distributors and joinery manufacturers.

Engineering Notes: Profile-Perfect by Design

The 4mm Professional Series was developed in consultation with profile manufacturers to be profile-perfect from the start. The 4mm width matches the standard channel opening of mainstream aluminium extrusions, so no adapters are required. The 480 LEDs/m density guarantees a continuous line behind both clear and frosted diffusers. The 25mm/50mm cutting units align with standard profile segment lengths, minimizing offcuts. And the 5W/m double-sided copper construction keeps the strip thermally safe inside enclosed channels for the full 50,000-hour life. For specifiers, this means a lighting solution that is dimensionally, thermally and electrically matched to the architecture it serves.

21. How do I join multiple sections within one profile run?

Cut at the marked 25mm/50mm point, seal the end, and join with a solderless clamp connector or a soldered link at the copper pads. With matched bin codes, joined sections maintain identical brightness and color, producing a visually continuous line inside the profile.

22. What is the maximum run length with a single power feed?

At 24V with the double-sided 2oz copper PCB, a single feed supports runs up to approximately 8m with negligible voltage drop; at 12V, keep single feeds to 5m. For longer continuous runs, add a second feed at the far end or parallel injection points to preserve uniformity.