Energy Saving Compact Fluorescents. 75W Replacement. Energy Star. Uses only 18 watts. Light Output: 1100 Lumens. Energy Used: 18 Watts. Average Life: 8000 hours. Lasts up to 7 years. Saves $220 in energy costs, as compared to using four 75 watt bulbs at 12c per KWH. To save energy costs, find the bulbs with the light output you need, then choose the one with the lowest watts.