I had the same question when I was getting my frog. He doesn't need flourescent light, it will hurt his eyes. I think that pet shop people are trained to say "UVB flourescent" no matter what animal you're getting! I got a 50 watt infrared bulb and a zoo med repti temp control dimmer, the dimmer cost around 20 bucks or so and does the job, I keep it on low and that keeps the warm side of the tank at about 80 degrees. If you dust your frog's food with calcium that has vitamin D3 in it he's fine.