Did You Know Dirty Light Bulbs Waste Energy?

Here’s how to clean your fixtures and brighten the room to boot.

close up photo of a modern, copper lamp with clean light bulb save energy
Image: mgstudyo/Getty

Granted, cleaning light fixtures is a hassle that requires a stepladder and a steady hand. But it’s a necessary spring-cleaning chore that freshens your home and gives you the light you’re paying for.

Dirt on the surface of a bulb reduces the light by 50% or more, says the U.S. Department of Energy. In turn, this may cause you to turn on more lights when you enter a room and/or use a higher dimmer setting. Either way, you’re wasting electricity.

Got a dirty light fixture? We’ve got your cleaning tips.

Chandeliers

Yes, you should dust your crystal chandeliers weekly, especially during pollen season. But once or twice a year, you should make those crystals sparkle with a thorough wash.

1.  If the chandelier isn’t too big, take it down and lay it on top of a towel spread on a table. If it’s huge, hire a handyperson to bring it down, or grab a stepladder and clean it while it hangs.

2.  Take a picture of the chandelier before you start cleaning. That way you’ll remember where each crystal belongs if you take them off during cleaning.

3.  Mix a solution of one ounce of mild dish soap with a quarter cup of white vinegar and three cups of water. 

4.  Add to a spray bottle.

5.  Spritz each crystal. 

6.  Let dry and polish with a microfiber cloth.

Related: Kitchen Lighting Design Tips

Light Bulbs

These days, bulbs have long lives thanks to LED technology. They’re bound to get dirty and should be cleaned.

Mary Beth Gotti, a lighting consultant in Cleveland, says a thorough wipe with a dry cloth is the best way to get rid of dust and dirt.

“If you use a damp cloth, you can get water into crevices in the lamp that can damage electronics,” Gotti says.  Also, don’t spray cleaning solutions directly onto the light bulb, which could damage the bulb.

Most important: Turn off the electricity to the fixture before messing with the bulbs. To be extra cautious, turn off the circuit breaker, or put a piece of tape over the switch so no one else turns it on while you're working.

Ceiling Fixtures

Ceiling fixtures can be a dusty, grimy, buggy mess. Carefully take down the fixture cover and slide it into a sink full of soapy water. Dry and shine with a microfiber cloth.

Avoid the temptation to put glass fixtures into the dishwasher. The glass can shatter, ruining your fixture and your dishwasher.

Pendant Lights

These usually are easier to reach than ceiling fixtures, so you can clean in place.

Turn off the light, let bulbs cool, then spray and wipe the outside of globes with a microfiber cloth and cleaning spray.

Wipe bulbs and extension rods and cables with a dry cloth.

Recessed Lights

Dust weekly with a long-handled duster, such as a Swiffer, that traps dust and cobwebs.  For a more thorough cleaning, wipe the insides of canisters and the bulbs with a microfiber cloth or a slightly damp rag.

Caution: Before cleaning, make sure the electricity is off and the bulb is cool.

Ceiling Fans

Dust the lights on ceiling fans weekly when you clean the fan blades. When a bulb goes out and you have to climb a ladder anyway, clean globes and bulbs with a microfiber cloth. If the globes are really dirty, take them down and clean with soapy water or a cleaning solution.

When removing or returning globes or bulbs, be sure not to steady yourself by grabbing fan blades, which will turn if touched.

Related: Ceiling Fans: Know the Spin Before You Install

Tricks of the Trade

1.  Dryer sheets are low-cost alternatives to microfiber clothes. They’re great for dusting bulbs.

2.  Wear goggles when dusting or spritzing overhead fixtures to prevent dust or cleaning solution from hurting your eyes.

3.  If you’re having trouble removing the bulb in a recessed light, cut a 12-inch strip of duct tape and fold it over the bulb so that the ends act like handles that are easier to grip than the glass.

RelatedCleaning House: Secrets of a Truly Deep Clean

Housing And Real Estate Expert Lisa Kaplan-Gordon
Lisa Kaplan Gordon

Lisa Kaplan Gordon is an award-winning, Pulitzer Prize-nominated writer who contributes to real estate and home improvement sites. In her spare time (yeah, right!), she gardens, manages three dogs, and plots to get her 21-year-old out of her basement.