This is a very interesting idea. I have a jardin dr120w(2'x4') that ive been using for a bit now and i love mine. the dual unit was not available when i got mine. while not having seen on, if it"s anywhere near as nice as mine, it's money. my only concern would be the ability to hold the weight...
i have a sj 120w(2'x4') and love it!! great quality and reasonably priced. i got mine from greners.com and was pretty impressed with customer service and shipping time. when i am able to upgrade on size, i will go back for sure. they also have great comparison videos on their sie. check it out.
at the risk of asking a stupid question, i recently was playing around and put a 400w mh bulb into my 400w hps light. It lit up and held a solid light output. i understand lights pretty well and am a semi-experienced grower, but i am curious; If i ran a mh light with an hps ballast, what would...