Your welcome. I wasn't sure if the pic came out clear enough. The eggcrate is plastic, but T5 lights should be cool enough to not melt it (I have a hotter running PC setup on my 20 gallon and it's not even close to melting it- although it's up on 2 inch high legs, even if it weren't, it wouldn't be too hot as I can place my hand on the bottom side and it's warm, not hot). If you get a new light fixture, I recommend getting the leg attachments that gets it up off the glass/eggcrate. Even though it won't run hot, it will still run even cooler with the legs. The cooler, the better. Keeps heat from transferring into the tank, and fluorescent bulbs put out more lumens if they have good cooling (fans and/or airgap).