You need a bulb that specifically says it emits UVB rays. Most will say UV but it needs to say UVB. At petstores there are some, they kind of look like flouresant lights and they emit both UVB and UVA. Those ones themselves don't emit heat, so you'd need something seperate for the basking area. I think as long as you have aUVB somewhere else you can have just like a regular 60W bulb in a heat lamp type thing over the basking area. I personally have a reptile light bulb (about $5 at petsmart) and it emits some (not much) UVB plus it keeps it warm as well. I'm not sure about this, I'm sure someone else will answer it for sure, but I'm pretty sure they only need light on them 12 hours a day and then at night as long as you have a heater you can turn off the lights. It kinda simulates their natural environment that way. Good luck.