Sure Energy Savers: Lighting
- Turn off lights (and other equipment) when not in use. High utility costs often include paying for energy that is completely wasted by equipment left "on" for long periods while not in use.
- Replace incandescent light bulbs with ENERGY STAR qualified compact fluorescent lamps (CFLs), wherever appropriate. CFLs cost about 75% less to operate, and last about 10 times longer.
- Install switch plate occupancy sensors in proper locations to automatically turn lighting off when no one is present, and back on when people return. Even good equipment can be installed wrong, so don't install the sensor behind a coat rack, door, bookcase, etc. It must be able to "see" an approaching person's motion to turn on the light before, or as they enter an unlit area.
- Adjust lighting to your actual needs; use free "daylighting."
- To prevent glare, eyestrain, and headaches, do not "over-light." Too much light can be as bad for visual quality as too little light — and it costs a lot more.
- Install ENERGY STAR qualified exit signs. These exit signs can dramatically reduce maintenance by eliminating lamp replacement and can save $10 dollars per sign annually in electricity costs while preventing up to 500 pounds of greenhouse gas emissions.
- Consider upgrading from older T12 (1.5" diameter) tubes with magnetic ballasts to more efficient T8 (1" diameter) fluorescent lamp tubes with solid-state electronic ballasts.