i use a oz moon globe as you can see in the pic. Here is aussieland we have 4 different wattages, i think i use a 60 watt. They generate heat but no light. Better for night as it doesn't keep beardie awake. I don't run it at night at the moment because our heater is on 24/7 and my house isn't overly cold (new heater and still working out the kinks). I do have it on a thermostat so when it reaches 28 on the cool end, it switches off. The thermometers are only there for testing, i thought the thermostat wasn't working and wanted to check temp at hot end.