Lights are really not a good heat source for BP's. Having a light go on and off at night is very bad. Balls are nocturnal and need to have normal day and night cycles.
Get some under tank heat pads and and a controler (Dimmer switch, rheostat or thermostat) and a digital thermometer. You can make your own heat tape with flexiwatt tape and have one heater that goes under all of your cages so you only need one set up to regulate all of your cages.
If your temps are not right and not changed at the proper times you will greatly lessen your chance of getting eggs. If you want more info on this send me an email
Kathyshawreptile@aol.com
Bps should be in individule cages especialy if they are not eating well. The roommate could be stressing them. Never feed with more then one in a cage.
Good luck
Kathy Shaw
Kathy Shaw Reptiles