Ok, thank you for your quick responses

While you're here lol, I'm also thinking of getting a stand for my bulb because right now, it's on a clamp across the tank pointing at the dock, and I hear they work better when they're completely vertical, plus there will be less risk of the clamp falling off.
Is it possible to get a screen top, use the stand and cut a hole in the screen so that the light can get through? This way I can raise the water level more, but the only problem is 1) How do I stop the turt from crawling out of the hole I cut, and 2) I have a filter that hangs off the side. Do you know how to work around this? Thanks for your help sony lol.