Reptile Light Fixture & Dimming Thermostat Combo. Wide Temperature Range: Maintains constant temperatures from 0.5℃ to 60℃ (41°F to 140°F) for optimal reptile health. Dimming Thermostat Benefits High-Efficiency Aluminum Reflector: Constructed from polished aluminum to maximize UVA/UVB output and heat projection, ensuring your reptiles thrive.