Light bulb manufacturers explain light output of LED light bulbs and CFLs based on wattage of incandescent light bulbs that produce certain amount of light output, in which CFLs or LED light bulbs to replace can produce similar amount of light output.
Below table shows different wattage of incandescent light bulbs and light output (in lumens) these light bulbs produce (*light output for incandescent light bulb shown in table is dependent on light efficiency of incandescent light bulbs):

Light bulb manufacturers explain light output of LED light bulbs and CFLs based on wattage of incandescent light bulbs that produce certain amount of light output, in which CFLs or LED light bulbs to replace can produce similar amount of light output.
Below table shows different wattage of incandescent light bulbs and light output (in lumens) these light bulbs produce (*light output for incandescent light bulb shown in table is dependent on light efficiency of incandescent light bulbs):
