An energy saving light, also called energy-saving light bulb, compact fluorescent light.   The modern fluorescent lamp is invented in the late 1890s by Peter Cooper Hewitt, it is a fluorescent lamp designed to replace an incandescent lamp.  And these saving power light bulbs are available in a variety of styles or shapes. Some have two, four, or six tubes. Older models, and specialty models, have separate tubes and ballasts. Some energy saving light bulbs have the tubes and ballast permanently connected. This allows you to change the tubes without changing the ballast. Others have circular or spiral-shaped tubes. In general, the size or total surface area of the tube determines how much light the bulb produces.

Compared to general-service incandescent lamps giving the same amount of visible light, energy saving lights use less power (one fifth to one third) and have a longer rated life (eight to fifteen times). Mercury is a necessary part of a CFL. They are composed of the ballast, mercury, and phosphor coating inside the bulb, all work together to efficiently convert electrical energy into visible light. Newer energy saving lights give a warm, inviting light instead of the "cool white" light of older fluorescents. They use rare earth phosphors for excellent color and warmth. New electronically ballasted CFLs don't flicker or hum.

The usages of this energy saving light are various. The best fixtures to use are usually found in the following areas of your home:

1. Bedrooms

2. Kitchen

3. Dining room

4. Living rooms

5. Outdoors 

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