OK waterproof endcaps are like 10 bucks plus shipping a pair lol. f that. soo that^^^ light would be waterproof? well not "proof", but you know what I mean, no need for the lid. How hot would that be it looks like pc right? AND!!! if ussually keep the lids propped open a little bit to let the gases exchange a little more freely, if I made a canopy, and left the lid on ther but propped open a bunch, I still would not need the waterproof endcaps correct? so like I could ditch the bought lid, take one of a bajillion 10 gallon tanks I have, remove a pane, and put legs on it propping it up an inch or so above the rim of the tank, securely? how much light would that it not even worth it? AND ONE MORE THING PLEASE.!.!!.!!. How hot is a too hot tank, I know stability is more important than overall temperature but how hot is too hot? In Florida with it now becoming winter, we havent been using the air, but the days are just hot enough to bump the heat up. thanks alot everybody.