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The light is made up of several different colour lights from the pic, wouldn’t it be more correct to test with all the LED on?
Lennium, as I explained in the video, my bench power will not run all LEDs and since all LEDs are th same, there is no benefit to running them all. The spectrometer can only see one at a atime anyway. Each LED is in fact several LED emmiters in a single capsule, but all capsules are the same, so the text is a fair one. I could test different capsules to see how consistent they are, but I know from other work that they are all pretty much identical.
@Chris Wesley 2 years later, but that’s the power of youtube. I don’t agree with your statement the LED’s are all the same. They look to have different phosphor colors. On this still you can see that: 0:52 . Maybe a cool tip, when you paused a Youtube video, you can step down or up one frame by pressing , or .
@Oscar I should have said “all LEDs of the same colour are the same”.
@Chris Wesley That’s not the point. You did measure one LED, but the whole fixture could maybe get a better result when all different leds are lit.
@Oscar OK it was 3 yers ago. I’ve just re-watcehd it. The assumption was that all LEDs are the same. To be really rigorous I’d test them all, but my conclusion was that they perform in the range advertised anyway, and I don’t think individual variation would have changed that conclusion.
Have you placed this under a commercially sold grow light like a MarsHydro or some other brand hanging over this pointing up as a plant would see the whole light instead of individual led chips?
No I have not done that; I build my own grow lights (viodeos on the channel if you’re interested).