Vktech 220V-240V 25/50/75/100W Mini Black Ceramic Heat Infrared Lamp Bulb (50W) Heating source: Ceramic, infrared, electrical, no light emitted Usage Suggestions: Heating, chicken coops, brooding, grow light Wattage: 25/50/75/100W Voltage: 220-240V Diameter of heating surface: 6.0cm ,Height: 7.50cm