Save $102 USD in energy cost. This Utilitech Natural Daylight Light Bulb is intended to use in 3 - way sockets only. This bulb operates medium, low and high. It has 10,000 hours of life. It has 600, 1600, 2028 lumens for brightness with a color temperature of 5000 Kelvin. Comes in a countertop display with six light bulbs packaged in a 9" x 5.65 blister pack.