Even if you’ve switched all your bulbs from incandescents to CFLs, it’s still good to practice turning off the lights when you don’t need them to save on energy.

Turning off the lights depends on the bulb. If you still have incandescent bulbs, it is always best to shut the light off when no one is in a room or if you aren’t using the light. Fluorescent lights are a little different, since constantly switching them on and off will make them less efficient. For CFLs and other fluorescent bulbs, if you know you won’t be using it within the next 15 minutes, shut it off.

Maximize the day light. Opening curtains to let in natural light is the best way to do this. However, since a lot of heat can escape through windows, especially older windows, close up the curtains after dark to avoid using more energy to heat your home.

Use directional lights. If you’re sitting at a desk or occupying only part of a room, you may not need to illuminate the whole space. Use smaller lamps to better utilize light in a room.

Install sensors. If you’re redoing a space or constructing a new home, consider installing light sensors that will automatically shut off when no one is in the room.

Department of Energy Home Lighting Information

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Daily Tip: Lights Out

Better Daylighting