I've gotten a bunch of PMs about the light rack and what to buy, etc. Instead of PMing everyone individually I thought it'd be easier to post here. I'm not an engineer so if you're using rather long pieces of tubing you may want to consult one. I don't know how rigid this stuff is but since some people use it to make stands for their tank I think it's gotta be pretty strong. It's actually pretty simple to use and put together. You can find a company website that will sell direct. You can also find companies that will help engineer it for you. I went to a company that sells some of their overstock, scraps on ebay. The hardest part was figuring out what to order. I used 15 series (1.5 inch square) 8020 T-slot aluminum framing. You can figure out what lengths you need and order them cut to size. I found them on ebay from 80/20 Inc garage sale in the length I needed. Once you figure out what size tubing you're going to use it gets easier to find stuff since fasteners, joining plates, accessories all fall under that same series of tubing. For fasteners I used the economy T-nuts and screws that I found packaged together, again on ebay. To fasten the 2 tubing pieces together I used a 4 hole inside corner gusset bracket. To attach the rack to the stand I used aluminum corner brackets. For the end of the tubing that is exposed I used an end cap, it's plastic and has a push in plastic fastener to keep it in place. To mount the gripper hanging wires for the fixture to the rack I got a screw, 5mm I think it was, and just screwed the gripper onto the screw and the head of the screw slid right into the slot.