Almost 20 percent of your monthly electricity bill can be attributed to your lighting costs. If you want to cut that portion of your bill in half, keep reading for 6 smart lighting tips that will reduce your energy costs dramatically.

1. Start using compact fluorescent lights.

The moment you switch away from incandescent light bulbs, you'll start saving money. New energy-efficient light bulbs have thousands of hours of power and only use a quarter of the energy. In fact, every CFL (compact fluorescent light bulb) you install in your home will save you $30-$60 over time.

While you're at it, replace your old halogen lights with CFLs as well. Halogen lights throw off a lot of heat and they can even be a fire hazard. Not only will you save on your electricity bill, you'll save on air conditioning too.

2. Install motion-detector lights.

Motion-detection systems are especially great for outdoor, garage and closet lights. They allow you to leave the porch light on when you go out, but only use energy when there's actually someone at the door or you're there trying to find your keys. Installing a motion-detector fixture is simple, but if you have questions about a particular brand or model, your local hardware clerk will be happy to help you.

3. Clean your lights and fixtures.

A clean light bulb and fixture is 100 percent more efficient than a dirty one. Just a quick dust with a cloth every couple of weeks and you can save a surprising amount on your electricity bill.

4. Set your lamps on a timer.

If you like to come home to a lit foyer, don't leave a light or lamp burning all day. Instead, install a timer to turn on the light a few minutes before you usually get home from work.

5. Turn off the lights when you leave a room.

It sounds simple, but so many of us walk around our big houses with every light in the place burning brightly. Try one month of absolutely diligently shutting off the lights every time you leave a room. If you're typically a ravenous energy user, your electricity bill will drop by at least 5-10 percent.

6. Use task-specific lighting.

Most well-lit rooms have overhead lighting, accent lighting and task lighting (specific, directed lamps). While it's nice to have such an array of lighting, that doesn't mean you have to use them all at once. Basically, use only the lights you need. For example, if you're simply reading, then opt for just your reading lamp and turn off the overhead light.