Use green lights. Instead of incandescent bulbs, switch to LED lights, fluorescent bulbs or compact fluorescent lights (CFL), which last longer and cost less energy for the same amount of light output. It will save you around 80% of your lighting cost.
Of course, it will save you more if you turn off the lights during daytime or if not in use.
Of course, it will save you more if you turn off the lights during daytime or if not in use.
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