My Eclipse 6 overheats as well, I'm running 2 13 watt CF bulbs though, so it gets to be about 81-82 with the lid closed. (With VENTS)
I am going to build a new enclosure for the hood out of wood, and have it sit above the water surface. Right now I have placed little blocks in the front corner so it lifts the hood off the tank top and allowed air-flow, that has helped a little bit. Right now the tank is at 76.9 degrees, and it's a couple hours yet till the lights come on. I think I might need use a dremel to modify the existing hood a little bit more, we'll see.
I have a LOT better luck with aquatic plants than with houseplants ... mb this is a sign.