Why go too 18/6?. If its power use fine. I dont revert i stay all the
way. Cannabis doesnt need "Rest" time. Read up Greg Greens Grow
Bible, It s a bit more up too date than a lot of U.S. Lit. Plants grow faster
under 24/7 uve also less heat problem's that way as the grow room stay's
at the same temps unless its a cold night of course. It all comes down to personal needs really. I d be of the opion that your plant may grow more in
height if you are cutting the power of for six hours, aldo i must say ive used
both light times and havnt seen much difference, but like i said above why not 24/7................

Peace From Dub