For ambient light, why don't you just get a cheap LED light or bulb or whatever and either use a timer or turn it on and off manually to provide some amount of day/night cycle? Then your lighting and heating can be controlled separately and you don't have to worry about having room for multiple different lamps and controlling them, etc.


Especially since you're likely to need to cover over a lot of the screen top in order to maintain humidity levels at least some of the time.