Lighting for GABF

[subconix]

I have a heating mat for the underside of my viv for my juvenile GABF, but the temp is about 5 degrees lower than it should be as well as the humidity. From what i see the majority of people advise against any lighting, but I feel as i need some sort of lighting to bump my temperatures to the levels they need to be. Im looking to go buy some sort of lighting and need advice as to what i need to buy that will be good for my situation, as well as a timer to simulate day and night. What kind of lighting should i get? Here is a picture of my little guy.