LED Engin sells a 10w 660nm red LED.....the procyons are 635 I believe...its still above 90% absorbtion...the 660s are just too expensive....least they were, getting cheaper now....hint hint HGL...lets see a Procyon 2.0....lol
whiskeytango

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Your style will eventually match your grow area and the amount of time and money you like to put into initial setup vs. long term maintenance.-stinkyattic

LED growing- An instructional grow log
Episode 3...Revenge of the LED
Episode 4: The Clone Colonies