In your awesome manual you talk about the different lights options, recommending HPS or HM, sodium or metal halide.
But, now I see L.E.D. bulbs for sale, and they are far above anything in terms of energy efficiency?
We’ve discussed this quite a bit, here are some other threads that covers LEDs more specifically:
http://www.ilovegrowingmarijuana.com/community/topic/what-brand-of-hps-system/
http://www.ilovegrowingmarijuana.com/community/topic/led-light-height-question/
http://www.ilovegrowingmarijuana.com/community/topic/experience-with-led-marijuana-grow-lights/