Yeah, you can change temps by changing watts or height. There are a couple problems with that. If you change the height, it spreads the heat out more and reduces the temperature gradient. If you change watts, there is no way to account for the ambient room temperature. If the room temp goes up, so will the temps in the viv since the bulb produces the same amount of heat regardless of the room temp. This is the stuff I have: 29 gallon viv, uth, 2 reflector lights, 1 thermostat, and 2 timers. First, I made sure the uth didn't get too hot (90 degrees). That was okay, so then a normal day of heat/light cycle goes like this: The uth is on 24/7, The red bulb operates off of the thermostat to provide an ambient viv temp of 88-89 degrees during the day. At 11a.m., the regular 40 watt bulb comes on and stays on until 8p.m. It is on a timer and not connected to the thermostat ( it doesn't have enough wattage to overheat the tank). During the day, when this bulb is on, the red bulb doesn't come on as often but still maintains the 88-89 degrees. At 1a.m. the thermostat power is cut which shuts off the red bulb until 6a.m. This simulates a nighttime temp drop. Then at 6a.m. the thermostat with the red bulb comes on and begins to boost the temps. At 11a.m. the regular bulb comes on simulating the start of midday sun. This cycle just continues. The Leos don't need the regular bulb, but the light is like a regular day would be.
1.0 Corn Snake "Motega"
0.0.1 Leopard Gecko "Zubi

