These lizards are adapted to hot desert conditions. The cage should have a daytime hot basking spot where the temperature exceeds 120 F, however the lizard must be able to retreat to areas in the low 90's. Incandescent spotlights can provide hot basking spots. The wattage selected depends upon the size of the cage. Thermometers should be placed at both ends of the cage and monitored to ensure a proper temperature gradient. Under tank heaters can be used to supplement heat, however these are diurnal species and regulate their body temperature by basking in the sun. Spotlights more accurately approximately the way diurnal lizards obtain their heat naturally. Night time temperatures should be less that the daytime highs. Temperatures should be allowed to drop into the mid 60's F.