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Lights Out!
It’s great if you replace your home’s light bulbs with CFLs, haloegens or LEDs, but the most efficient light bulb of them all is the one that is turned off! Flip the switch when you leave the room. On average, lighting accounts for 11% of a home energy usage. While it’s true that most bulbs use a hair more energy when first lighting, from what I’ve been able to research, you’ll still end up with a net savings if you cut out the light even if you’re only going to be gone for a minute.