Thank you for explaining why I picked the spectrums I did I have a little chat drawn up for each spike used.
As stated all red would be nice and "works" but you are completely missing out on b-carotene which is used to harden the cells against uvb allowing for higher photo absorption , the lack there of would mean high intensity light sources would burn your plants thus it is a good idea to have a balanced spectrum even tho you can get away with using red spectrum lights like hps.
I have a few notes on what each of the pigments does as well.
Growth is alsi directed towards blue light. If you have a blue light on one side and a red on the other the plant will lean more towards the blue even if they are at the same photon intensity.