Subcool's getting some serious frost under his 320 Watt Cannon:smoking:
Full spectrum LED's give the plants a much better balance between the different colors of light.
The improved spectrum gives you a free boost in quality, just by switching to COB's! (COB stands for Chip On Board LED's)
I use 3500K 80CRI because it's the best for full cycle growth, and it gives you the best boost in quality without sacrificing yields. My opinion is based on Growmau5's early work and a few years of experimenting.
I went a little ham on the supplemental lighting! In this picture I'm running 3500K 80CRI + 5000K 80CRI COBs with 390nm UV, 660nm Photo Red and 730nm Far Red. I had fun but the results were pretty much the same as running 3500K 80CRI by itself.
If you want to supplement something I'd still recommend adding in some 730nm Far Red with a Growmau5 Puck. One puck has the same max coverage area as one Cannon (3' x 3') and it costs $37 with it's own regular 12V wall plug.
The quality boost comes in automatically with full spectrum white COB's though! You get a much more balanced, even blend of light colors and the plants respond to it right away!
Check out these graphs
FULL SPECTRUM COBS
HIGH PRESSURE SODIUM
