Exo Terra Heat-Glo Infrared Spot Lamp, 50-Watt/120-Volt (4 Pack) Pack of 4 Exo Terra Heat-Glo Infrared Spot Lamp, 50-Watt/120-Volt Powerful source of infrared heat emissions Increases overall air temperature of terrarium Ideal for nocturnal viewing Can be combined with Exo Terra Repti-Glo or Sun-Glo bulbs