Dear all-
LED lights are extremely effective as a sole lighting source, provided you have one with effective intensity and effecient spectrum. I have found that any 90W UFO (or higher W) with 660nm Red and 460nm Blue will do just as much as the average 400W HPS or MH in terms of growth rate, color, and plant density. Newer 120W units with 640nm + 660nm red, 460 Blue, and white in the mix are far more effective and grow big bushy plants very quickly.
While I agree LED grown plants take slightly longer to bud fully, I feel there is ABSOLUTELY NO compromise in the end result. In fact, especially in enclosed areas, you are almost guaranteed a healthier, cooler, disease-resistant plant vs. a HID light, which will leave you with a much happier end product. Paired with much less noise, risk, work, upkeep, and a $10 electric bill? Which makes more sense to you?
God bless and happy growin'!
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