Heating for coastal setup

[Kaianuanu]

I decided on a baby coastal and Im going start him off in a 10 gallon. I was wanting to go with a heat lamp as opposed to a UTH to promote climbing. I figured i'd get a red bulb and leave it on 24/7, and maybe a fluorescent that puts off little heat for a day/night cycle. Anyway, I was wondering what wattage you guys recommend I try first for the heat lamp, given that my house almost always has an ambient temp of 80 degrees.