It depends on the lumen output of the bulb that you are replacing. You should check the lumen output of the energy saver bulb, and make sure it matches the output from the incandescent/halogen bulb that it is replacing. Here is a quick comparison guide:
LED bulbs are about 40% more energy efficient than a CFL bulb, and up to 85% more efficient than incandescent or halogen.
| Incandescent/Halogen wattage | Lumens |
| 100 watt | 1600 |
| 75 watt | 1100 |
| 60 watt | 800 |
| 40 watt | 450 |
