Replaces incandescent bulbs up to 1000 watts, but uses only 100 watts of power and lasts up to thirteen times longer than standard 1000 watt bulbs. Compact Fluorescent Light (CFL) type bulb. One bulb per package. Bright white sunlight. 100 watts. E39 mogul base. Light output of 10500 lumens. 6500K color temperature. One bulb per package. Ballast not included.