I have a 65 gallon that I just set up with some various plants just to see what would survive, what wouldn't. the amazon swords and the italian and corkscrew val's aren't doing so hot with my single 48" light that came with the tank. the bulb has no markings and the balast is a remote style in the chord so it's fairly old and probably a low wattage. I've been reading some posts on here about cheap alternatives and DIY systems. I read about some 96 watt single bulb setup kits that are around $60 and such but I also saw many recommendations to Home depot so since Home Depot is just next door to where I work, I ran over there to see what they have. They don't have any 48" lamps over 40 watts. I can get a dual bulb 40 watt setup for about $25 and building a hood to mount it to would be no problem but it seems that's less than recommended for plants. I checked out just building a system but they don't have much assortment of ballasts. Anything over 40 watts is listed for 6 or 8 foot bulbs. I'm no electrician although I can wire stuff up like this (ran the wiring for my bedroom when I built it) but can I use a ballast meant for 96" bulbs at 75 or so watts and use 48" bulbs instead? how does the ballast know? would that cause problems being that there is less gas to use? there are some more involved hardware stores around that I could check and maybe come up with some better stuff but this was just an idea since I was so close. I can't do anything this weekend anyway. Also, they had T-8 and T-12 design bulbs, is one better than another? I know I've been asked what size bulb I had before at Petsmart so they must make both. Another thing, Home Depot carried several 48" bulbs, one meant for aquariums and plantlife but they are 40 watt like their lamps. thanks for any advice or tips. KYle