8 Bulbs Utilitech Daylight 23-watt =100 Watt Equivalent- Energy Star - 2 Packages with 4 Bulbs=total 8 Replacement 100 Watt Bulbs ENERGY STAR! Bulb life is 10000 hours Medium base that is frequently used for table lamps, enclosed fixtures and bare lamp Mini twist light bulb Uses 23 watts for 1600 lumens of brightness