LED Colour Rendering Index

The colour rendering index (CRI or Ra) is a measure of how well a light source reproduces the colour of an object compared to a standard source. The index value is computed from how well the light source under test reproduces the colour of a number of standard colour swatches. Generally, colour rendering index between 80 and 90 is good and value between 90 and 100 considered as very good.

We provide CRI value >80 for LED strip as standard, however CRI >90 or >95 is optional upon the request.

LED Colour Deviation

Normally we use SDCM 5 or SDCM 3 standard LEDs to make our LED strip lights. 2 SDCM or 3 SDCM (3-Step MacAdam ellipes) is the highest standard which currently available in the market. The colour deviation between LEDs rarely found by human eye perception.

The SDCM (Standard Deviation of Colour Matching) value defined from visual colour matching experiments its shows the standard deviation of the colour discrimination variations from a specific center on the XY chromaticity diagram based on ANSI engineer Davis Lewis MacAdam described. Increasing size of ellipse can classify the maximun colour deviation of light sources referred to as MacAdam ellips of a certain step size SDCM.

LED Lumen Maintenance 

There is lumen decay after a long time use of LED strip light. The components and current of the LED strip light have the greatest impact on lumen decay. The key components of LED strip light are: LEDs, PCB, coating materail as well as resistors.

We use very high quaity materials to make LEDs:  use Epistar chip/San"an chip/branded LED chip, and intermatix phosphor powder, ShiEtsu & Dow Corning Glue, Heraeus 99.99% pure gold wire, pure copper holder.  As you may know price competitors use poor phosphor/copper or aluminum alloy wire/fake epistar chip or poor quality chip to make LEDs. These will leads to inconsistant color, lumen decay, fast color shift and poor stability. For the PCB, we design with 2Oz, 3Oz, 4Oz thickness copper to acheive stability and good heat dissipation. For the coating material, use high quality silicone glue/PU glue to make it better heat dissipation rather than poor silicone/PU/epoxy gel which getting yellowed very quick.

As you may see from above, we can sure our failure rate on luminous flux <10% after 30000 hours.