IT looks sweet so far- are you using board or plastic sheeting for the walls? Do you have something to lift the res off the cement floor in case of chill? And I always recommend to people- ESPECIALLY hydro growers- that the ballasts and all electrical components be set up at least a foot off the floor in case of flooding. Even growing in the attic I've always been neurotic about preventing damage to the ballasts, or even fire, from a spill.