Dude, the top marijuana growers of the world use 24 hours of light. Jorge, Ed.. countless others. The G's of growing are super pimps that know their shit.... they use 24 hours of light. I don't care if you suck.. just don't try to tell me that your way doesn't suck, it sucks! Darkness makes your shit more succeptable to mold, insects, overwatering (if you water in the morning, you be good i guess, just don't water em like crazy eh!)