For leopard gecko heating let’s get the do not out of the way first…
NEVER EVER USE A HOT ROCK, HEAT ROCK, OR ANY SIMILAR PRODUCT if you do you risks the possibility of thermal burns.
Just skip light bulbs altogether and use an under tank heater. They do not emit any light, no replacement needed and less of a fire hazard if set up properly. They also do not dry the air out as much.
Do not use crappy heat mats go with the Exo-Terra Desert model.
If you must have a light use a red light. The reason for red light is that they cannot see it; you keep from having a massive temperature drop at night. You would not see much of you gecko with a blaring bright light. Also there are black and blue light that will work however you will not see the gecko at night very well if at all.
Do not measure the temperature in the tank with a thermometer on a wall etc., the temperature on the bottom of the tank that matters where the gecko spends the majority of its time.
Here are some more tips for a properly warmed and happy gecko.
The leopard gecko heating environment should be between 82 to 88 degrees all day and night.
Heat one end of the environment more so that the gecko can move to and from the heat source to regulate its body temperature.
Leave the heating pad on all night. Think about the room temperature also. If you live somewhere where the temperature may vary significantly, make sure not to overheat the cage in the summer or under heat during the winter. Temperatures in most homes can range from about 64 in the winter to 85 in the summer. So turn off one or both of the heating elements during the hottest parts of the summer. (Try using a thermostat and adjust accordingly.)
To know more about Leopard Gecko visit: Leopard Gecko Caring