Remarks: For a 20-meter low-voltage DC light strip, the brightness at the beginning of the light strip will be significantly brighter than that at the end.our Heading Text Here
If you are going to purchase LED DC light strips, you are likely to encounter the following situations:
1. There will be some lighting brands that promote this: Our light strips have no voltage drop, so there is no brightness attenuation, because our quality is very good;
2. Some experts will tell you this: Generally speaking, for 24v light strips, there is no brightness attenuation for 5 meters, and only for 10 meters or more;
3. Some sellers will tell you: there will definitely be brightness attenuation, but our products only attenuate a little bit, which is not noticeable at all, so it is not worth mentioning.
Are the above 3 points true? Is it credible?
As a third-party quality inspector and engineer, I actually didn’t know whether the above answers were correct. Because the world is so big, there will always be new technologies and miracles. Moreover, I also know that many people in this world speak based on their feelings. When they make conclusions, there is actually no reliable and scientific data as a basis.
But I have a unique, ancient, and seemingly silly way to find the answer to this question, that is: choose a sample of the DC light strip, and go to our LED light laboratory for actual testing.
The testing process is in this video:
Note: In my previous video, I also showed the process of detecting voltage drop. It’s here:
Let’s sum it up:
For a 5-meter-long 24V light strip, the CCT, RA, R9, and SDCM of the 1st and 5th meters have almost no change, showing good light color consistency, but the luminous flux has dropped from 1124.7LM to 755.7LM. This ratio is not small.
It is worth mentioning that the COB Strip light sample we tested was produced by a large LED lamp manufacturer, which is the OEM\ODM factory of many internationally renowned lighting brands, so relatively speaking, its product quality is good of. It is conceivable how the actual brightness attenuation of other COB LED Strip Lights will be.
We can help you in China with inspection and finding reliable manufacturers.
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