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.