Explainer
Lighting controls explained
Dimmers, motion and occupancy sensors, photosensors and timers save energy by turning lights off or down when no one needs them.
Satisfy+ Editorial · Published June 1, 2026 · 2 min read
At a glance
- Dimmers
- Save electricity when the lights run lower
- Sensors
- Turn lights off when no one is there
- Timers and photocells
- Turn lights off when they aren't needed
- Bulbs
- Check the package says it works with the control
Lighting controls save electricity by turning lights off when they aren't in use or down when full brightness isn't needed. The common kinds are dimmers, sensors that respond to people or daylight, and timers. During the day, opened curtains or shades let daylight do the job instead of the lamps.
Matching the bulb to the control
Many LED bulbs are dimmable or can be used with daylight or motion sensors, and some can't. Check the package to be sure a bulb works with the control you want to use it with. The same goes for a fixture: pick controls that are compatible with the efficient bulbs and fixtures in the house.
Dimmers
A dimmer saves electricity whenever it lowers the light level.
Sensors
- Occupancy and motion sensors turn lights on when someone is there and off after they leave. They suit spaces used now and then.
- Infrared sensors detect the heat a person gives off and work best where the whole room is in the sensor's view.
- Ultrasonic sensors use high-frequency sound to detect motion, even around corners.
- Photocells sense daylight and keep lights off while it's light out.
More switching can shorten a bulb's running life a little, but the fewer hours a day it burns usually make it last longer overall.
Timers
Timers switch lights on and off at set times, so lights don't stay on when no one needs them. A plug-in timer runs a lamp.
Outdoor lighting
Many LED fixtures for paths, steps and porches have automatic daylight shut-off and motion sensors built in. Solar-powered outdoor lights are another option.
An annotated example
What to do next
Check that the bulbs on each dimmer are labeled dimmable, and plug a lamp into a timer before the next trip away.
Put the lights on controls
- Check that the bulbs on each dimmer say dimmable
- Plug a lamp into a timer for the next trip away
FAQ
Can I use LED bulbs with a dimmer switch?
Only LED bulbs that are dimmable. The package says whether a bulb works with a dimmer or a sensor.
Do lighting controls save energy?
Yes. Timers, photocells and sensors turn lights off when they aren't in use, and dimmers save electricity when they lower the light.
Do sensors wear out bulbs faster?
More switching can shorten a bulb's running life a little, but fewer hours on each day usually make it last longer overall.
Sources
Checked October 20, 2026
- U.S. Department of Energy, Energy Saver. Energy Saver guide: tips on saving money and energy at home (2022)
- U.S. Department of Energy, Federal Energy Management Program. How to select lighting controls for offices and public buildings (2000)
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