Light bulbs
When you turn on an incandescent light bulb, only 2% of the electricity used is turned into light. The rest is wasted as heat.
Electricity needed to power a light bulb
One kilowatt-hour (kWh) equals the amount of electricity needed to power a 100 watt light bulb for 10 hours.
Light bulbs that save energy
Energy saving light bulbs last up to 12 times longer than ordinary light bulbs, and can save up to ￡100 on electricity over the bulb's lifetime.
Household lighting
About 12 to 15 percent of the electricity used in a home is for lighting.
It is best to use CFL lights in places where they will stay switched on for long periods. Switching CFL bulbs off after only a few minutes of use can reduce their lifespan.
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