Ok, I got a 60wt Red blub and ceramic lamp to help boost temps on the warm side if you can call it that since the tank is only 20gal. The temps fluctuate between 85*F (low side) to 95*F (high side). I went for this type of light since I had read that balls are nocturnal and the bulb packaging mentioned that. When I turn the light off durring the day about 9am and turn it on when I get home, about 7pm. The temps are down to about 80*F or so. I know this seems too low, so can I leave the light on 24/7? They do have an under tank heat pad that stays on. Most likely I will be getting a bigger tank this weekend, aroud 40gal with a nice base so my girl wont bi*** about them being in the living room and not matching the décor.