What? Who does that? Well, smart people. A dirty bulb emits 30% less light than a clean one. Dust off both the bulb and fixture, and you might be able to cut back on the number or brightness of lights in each room without noticing any difference.
And replace any older bulbs with LED bulbs…….By replacing just five of your most-used incandescent bulbs with uber-efficient light-emitting diode (LED) bulbs, you could save $75 a year on your energy bill.
And LEDs last 15-20 times longer than incandescents, so you won’t have to replace them nearly as often.