Your home’s lighting may be dimming your finances, as energy for lighting accounts for about 10 percent of your electrical bill. Overhead lights with traditional incandescent bulbs are a major power drain, so check your fixtures to see what bulbs are in each. You may have 100 watt bulbs where 60 or 75 watts would be sufficient. And, consider Energy Star rated compact fluorescent or halogen lights that reduce energy use but deliver lots of bright light. Also, make sure you completely turn off stereo systems and computers when not in use, which continue to use energy even while idle.