18W CFL Light Bulb 2700K Warm White 75 Watt Equivalent (50-Pack)You will receive 50 Light Bulb *Save $50. 00 in Energy Costs* Light output: 1150 Lumens Energy used: 18 Watts 50. 00 energy cost savings over the life of the bulb based on 8,000 hours and is calculated based on 11 cents per kilowatt hour rate versus the cost of burning (8) 75 watt incandescents for the same amount of time. Average rated life based on 3 hours of daily time use. OptoLight Compact Florecent Bulb. 18W = 75W. Brightness at 1150 lumens.