Originally Posted by Dutch Pimp
Hi... Mac
I go three weeks under 6500k fluoro tubes...then, I go CMH all the way to harvest.
the grow before that, I went Hortilux HPS all the way. Less stretching with the CMH, about a foot shorter and the CMH ran cooler temps in my closet.
Reflectors play a big part with UV light; I think, too? Not all reflectors are created equal. I think the dimpled ones are better. I have a smooth polished one...:(...and have to 'offset' my plants some; not directly under the bulb....so I rotate daily.
Lots of peeps like the 'warm' 4000k MH bulbs, too....(like sunmaster's for example)