CFL Equivalent Wattage (Compact Fluorescent Bulbs)
I tried sleuthing for what I thought would be simple answer. But, no. Everyone’s got a different answer as to what’s equivalent and exactly how much a CFL will save you over the life of the bulb.
But with all the numbers, I discovered that the rule of thumb seems to be to look for a CFL that’s roughly 1/4 (one-fourth) the wattage of the traditional incandescent bulb you’re replacing.
Based on the information I found, the chart below should be a good estimate:
| Incandescent | | CFL Equivalent |
| 150W | 42W |
| 100W | 23W |
| 75W | 18W |
| 60W | 14W |
| 40W | 11W |
| 15-25W | 3W |
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An alternative that leaves less guessing in the comparison is: look for a CFL or a LED that is rated at the same, or near same lumens (light delivered) as the incandescent you wish to replace. There may be some variation here, manufacturer to manufacturer, but there are supposed to be regulations governing the measuring and stating of the light output–and most lamp packages contain this information.
i’ve never noticed the lumens reating on standard bulb packages. Good tip! Thanks!