Our Basking Spot Light Bulbs and Night Black Heat lamp Bulb are Can be Used With the Temperature Controller or Thermostat Switch, Can match all kinds of reptile fixtures easy to use Incandescent Black Light Heat Bulb Provides Ambient Heat ,Simulates The Natural Stars And Moonlight,Make Reptiles Feel More Comfortable , Active at Night UVA Incandescent Basking Spotlight Bulbs Simulate Natural Sunlight to Provide Reptiles With The Necessary UVA And Heat to Enhance Their Physical And Mental Health. Helps Promote Reptile Natural Behaviors, Including Appetite Stimulation, Courtship Performance, Foraging And Overall Vitality. Our Heat Lamp Bulbs For Reptiles Can Ensure Your Pet Gets The Optimal Warmth And UVA Ray to Help Them Thrive And Grow. Our Reptile Heat Lamp Easy to Install,E26 Lamp Holder, 110v Voltage, Can Be Installed And Used Directly , Can be Matched With Different Reptie Light Fixtures For Leopard Gecko Bearded Dragon Tank Widely Use :The Infrared Heat Lamp Not Only Can Be Used In Reptile Tanks For Bearded Dragons, Hermit Crab, Lizard, Tortoise, Geckos, Snake,Double Crested Lizard And Rhacodactylus Auriculatus etc, Also Can be Used For Chicken Coop, Dog House, Cat House.Its A Widely Use Tank accessories Leoterra's Reptile Use Heat Lamp Bulbs Have Long Service Life, can be used over 2000 hours * THIS PACKAGE WILL BE INCLUDE 2PCS 50W HEAT BULBS 1PC DAY TIME Incandescent Basking Spotlight Bulbs(R63) AND 1PC NIGHT BLACK INCANDESCENT HEAT LAMP(A19) THE DAY TIME HEAT LAMP HAVE WARM WHITE LIGHTS OUTPUT , THE NIGHT BLACK HEAT LAMP HAVE Bluish violet LightS OUTPUT looks like the moonlight Base for bulbs : E26 VOLTAGE : 110-120V