BT15 ECO Halogen Medium Base Bulb [Set of 8] Wattage: 53 Watt Get the perfect light with the BT15 E26 Medium Screw 53 watt 120 volt Halogen light bulb. Box contains 1 bulb. Dimmable: Yes, Color Temperature: 2900K, Soft White Average hours: 1000, Beam Spread: 360, CRI: 100, Lumens: 1050, MOD: 1.875, MOL: 4.33