For a narrow linear detail, start with the profile’s usable internal width and height, then check the strip, diffuser, wire exit and installation method as one assembly. A 3mm PCB can be a candidate when lateral space is limited, but the nominal strip width alone does not prove that it will fit or run as intended in a particular channel.
LEDStripStar lists a COB 3mm 400LED DC12/24V CRI90 model. Confirm the selected voltage, color, protection construction, cut interval and final configuration on the quotation before ordering.
Direct Answer
The 3mm COB model is worth evaluating for narrow joinery details, shallow niches and small channels where a wider board will not fit. The best choice still depends on the available channel, required light level, viewing distance, operating conditions and the way power reaches the strip.
For GCC projects, send a profile drawing or a measured channel cross-section with the strip request. Include the cover, end caps, cable exit and mounting details. That gives the supplier a specific assembly to review instead of a strip width in isolation.
Five Checks Before Choosing
1. Measure usable clearance
Measure the internal base width at the point where the strip will sit, then account for sidewalls, cover clips, end caps, solder joints and the cable route. A channel’s outside dimension may not describe the space available to the tape. If the profile is recessed into joinery, check the actual routed opening and how the profile will be serviced.
The aluminum-profile guide explains how to compare strip width with the channel and cover. A narrow strip still needs a clean mounting surface and room for the connection.
2. Judge the light through the actual cover
COB construction can give a continuous-looking emitting surface, but the installed appearance depends on the diffuser, profile depth, setback and viewing angle. Review a sample inside the proposed profile and cover. Check for visible points, bright edges, dark joints and reflected glare from normal viewing positions.
CRI describes one aspect of color rendering; it cannot predict how every interior finish will look under a particular source. The CIE explains the role and limits of CRI for white LED sources in its colour-rendering guidance. For a hotel project, compare the sample with the actual stone, wood, fabric or merchandise under the intended lighting scene.
3. Check output against the lighting task
The catalog lists the 3mm model at 500lm and 7W/m. Treat that as a model-selection starting point. Confirm how the manufacturer states the output and assess the sample after it is installed behind the selected cover; the bare-strip figure does not describe the illuminance on a finished counter or wall.
If the detail is only decorative, a lower output may be adequate. If it must light a work surface, coordinate the strip with the rest of the lighting design and test it at the intended setback. Do not choose by LED count or PCB width alone.
4. Test the profile and installation conditions together
A narrow channel leaves less room around the strip and its wiring. Check how the selected assembly behaves after installation, including the profile, cover, mounting surface and expected operating period. The supplier’s product data and the profile manufacturer’s instructions govern the actual installation. Approve a production-representative sample when the channel is enclosed or difficult to service.
Avoid folding or sharply creasing the strip to make it fit. Confirm the permitted bend direction and radius for the exact model, and keep cut and solder points at their designated locations. The diffuser guide covers the appearance check in more detail.
5. Confirm voltage, feed points and controls
The listed model is available in DC12V and DC24V. Select one system voltage for each line, match the supply and controller to it, then calculate the load from the specified watts per meter and run length. Cable distance, branch layout and voltage at the far end also matter. A larger power supply does not remove voltage drop within the strip or its feed cable.
Use the voltage-drop and power-supply guide to prepare the layout. Confirm cut interval, lead-wire arrangement and any control requirements before the factory quote is finalized.
A Catalog Candidate
The COB 3mm 400LED DC12/24V CRI90 is the site’s narrow COB model. Its published catalog details are 3mm width, 400 LEDs/m, 7W/m, 500lm, CRI90, and 3000K/4000K/6500K/blue options. The listed supply lengths are 5m and 10m. The IP rating is confirmed for the selected construction, so ask for the exact protection configuration if the installation needs it.
For a channel that accepts more width, compare the other models in the COB range by the required output, color and mechanical fit. A wider or higher-output strip is not automatically a better fit for a shallow detail.
Approve the Installed Assembly
Before a bulk order, put the strip model, selected voltage and color, profile drawing, cover, cut plan, wire exit and packing format on one approval record. Test the complete assembly from the specified power supply and controller. Check the appearance from the intended viewing position and measure the installed output if the project has a stated light-level target.
The catalog’s standard MOQ is 500 meters per specification. For a project or distributor order, submit the model, required configuration, quantity by specification and destination through the quotation form. The GCC market page can help structure a regional project inquiry; availability, packing and shipment details must be confirmed in the individual quotation.
Catalog & Sourcing Note
This article is prepared from our current product catalog and B2B specification workflow. Electrical, waterproofing and installation requirements vary by model and market, so confirm the final specification and approved sample before ordering.
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