Bulb Style: BR-30 Screw Base Size: Standard E26 (Edison Screw) Voltage: 120V UV Spectrum: UV-A Wattage (Standard Mode): 30W Wattage (Lifestyle Mode): 20W Light appearance: 3200K Brightness: 850 lumens Location: Indoor use Product height: 5.45 inches Bulb diameter: 4.22 inches