150 Watts? What size tank is it? I have mine in a 20 long at the moment, I am getting ready to move them to a 40 breeder, and I am sorta lost on the light and heat thing. In their current tank, the cool end is about 72 and the warm end is 80-85 depending on how it is in the house. Any suggestions? I am thinking an undertank heater for the 40 and at least 75watt light.