... GradeIP40 Comparison chart: Cost Comparison between LEDs, CFLs and Incandescent light bulbs LED bulbCFLIncandescentlifespanover 50,000 hours10,000 hours1,200 hoursWatts per ... Savings over 50,000 hours, assuming 30 bulbs per household Total cost for 30 bulbs$1,125.00$2,775.00$10 ... .997kg carbon dioxide, we appeal all people to use led bulbs to heal the world, heal our homes.