Globe Electric 13w cool white medium base compact fluorescent light bulb 2 pack. Light up your home with Globe Enersaver bulbs and save in energy costs. With a growing concern for reducing energy consumption, Globe"s compact fluorescent bulbs are a must in every home. CFLs use approximately 70% less energy than incandescent bulbs and produce the same light output. One CFL bulb lasts from 8,000 to 12,000 hours or up to 10 years. This saves you money in energy costs and bulb purchases when compared to regular incandescent bulbs. This energy star certified light bulb uses only 13-watts of energy but produces 60-watts of light output. Lighting Facts; Brightness: 900 lumens: Estimated yearly energy cost (Based 3hrs/day, 11¢ KwH Cost depends on rates and use): $1.57, Life (Based on 3 hrs/day): 12,000 hrs, Light Appearance: 4100 kelvin, Energy Used: 13 watts.