Does it save money to turn lights off when leaving a room?
Yes. Most household lights are incandescent. Any time you turn off a light you use less energy and save money. Dimming an incandescent bulb can also save money and will extend the bulb’s usable life. On the other hand, modern compact fluorescent bulbs are designed for low wattage and long life. It is best to leave these on when leaving the room for short periods. Although turning them off will save energy, constant switching can result in premature burn-out of the lamp.