Ya Opie there are alot of benefits by manipulating the Phytochrome FR and phytochrome R in plants. And I did read on a french grow site that a 2:1 blue:red is optimal for vegetation and at least a 2:1 red:blue is required for flowering. The reason is the flowering stage needs the red light for the phytochrome and other cells in the plant, while the red light is not needed for vegetation. The UV-B (310-315nm) has many positive effects that I think needs to be implemented in a LED growing situation, since with LED's we are only giving blue and red. UV-B wavelengths are not commercially available as LED wavevlengths YET, however I emailed a company who said they can produce any wavelength ALHA-ONE ELECTRONICS LTD. _LED. Also Opie, can you furtur your discussionon why green and other colors arer needed? I have found little on this subject so your imput would greatly be appreciated.
physicsnole Reviewed by physicsnole on . The concept of the red / far-red system (phytochrome system) Found it interesting, thought I'd share. "A surplus of light like the strong UV radiation in high mountains causes drastically reduced elongation of the internodes, a decrease of the assimilating surface, often to a strongly enhanced production of anthocyanes and usually also to intensely coloured flowers." "the growth of lettuce seedlings is not influenced by the subsequent exposure to light of the wave lengths lambda = 658 nm and lambda = 768 nm, while the exposure to both wave length Rating: 5