That spectrometer thing was cool. I am making one tomorrow. I am confused. Do the different wavelengths of light do different things to the plant? A leafy plant grown with lots of blue light is an example. If that is true.
You could build a lot of LED lights a few hundred of them, each a different wavelength. Grow identical plants under all the different individual wavelengths.

I guess my question comes down too...
We know plants use some wavelengths more efficiently than others but do the different wavelength contribute to different growth characteristics?
My experiment would tell you but it is not very practical. I do not know any other way to figure it.
demoreal Reviewed by demoreal on . Drowning in conflicting plant graphs - help! (LED) Still trying to design my LED light through clear understanding and not just mimicking. There is one photosynthetic response curve that shows yellow light has more effect than blue light and that green, while lower, is almost as useful. Other articles say green light may stunt plant growth and that yellow is not much more useful (despite the huge success of HPS). Then there is the photosynthesis action spectrum showing that violet/purple light (400nm) has the highest absorption peak Rating: 5