Turn off lights when you leave a room or when they are not needed. Much of the energy used is given off as heat.
Install energy-efficient compact fluorescent bulbs. They give off less heat and use as much as 75 percent less energy than regular bulbs.
Compact fluorescent light bulbs (CFLs) are available in a variety of creative shapes, color temperatures and brightnesses. Some are dimmable and can respond to motion sensors. A typical CFL outlasts 8 equivalent incandescent bulbs.
Keep bulbs and lighting fixtures clean for maximum lighting.
Pull the plug on instant-on appliances (such as televisions) when you don't plan to use them for a few days or more. They draw current even when switched off.
Use task lighting directed at a specific area instead of overhead or general lighting.