see4
Well-Known Member
White light spectrums, 3000k, 4000k, 3500k, 6500k, etc produce wavelengths measured in nanometers that are useful for the plant. Adding more of one wavelength will not negate the other wavelengths being produced. That's not how light works.Do you grasp the fact that monochrome light does not have a "CCT"? Your argument above makes no sense and does not apply in any way to combining WHITE LIGHT spectrums.
I'm not sure I'm following you on this one... the premise of me building a board with 3000k and 4000k diodes is to use them from start to finish. If I wanted more far red, I would have asked for it. I asked for what I wanted, which is a good mix of 3000k spectrum (more far reds) and 4000k spectrum (more far blues) to give a "good" balance for both veg and flower.Looking at curves is misleading. Sure it looks like you are just adding a chunk of red light from 640 - 700nm - but you are also adding everything on the curve that's below 640. Once the combined curve is re-normalized all you really have is a red peak shifted some. Again, at the risk of repeating myself, this is something that Stephen has actually measured with his spectrometer and posted. You don't really get anything that "wasn't" there, you just get more of EVERYTHING with the ratio shifted some. All of those red wavelengths from 640-700 ARE present (in the 400K), just not as much of them. if you want more far red, then just add far red, without all the rest of the spectrum that comes with a white diode.
It's nonsense to stipulate that combining such diodes will produce a 3500k spectrum. 3000k spectrum has wavelengths that are not "seen" in 3500k spectrum. And 4000k has wavelengths that are not "seen" in 3500k and 3000k.