Why do fluorescent lamps need a ballast?

The product of all factors that contribute to lowering the illumination level including reflector degradation, dirt, lamp depreciation over time, voltage fluctuations, etc.

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The proper term, High Efficiency (Energy Saving) Electromagnetic Ballast, is a ballast with a core & coils, designed to minimize ballast losses compared to the "standard" ballast.

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A solid that directly converts electrical impulses into light. Some LED's today incorporate fluorescent materials to change the color characteristics of the emitted light.

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Please refer to your state policy. In most states, fluorescent and compact fluorescent light bulbs used at home can be disposed of in the same way as regular light bulbs. While all fluorescent bulbs contain a trace amount of mercury, the quantity is so minute that disposal is not regulated by federal standards (established by the EPA, the Environmental Protection Agency). You would have to dispose of an incredibly large amount of fluorescent bulbs — around 360 4-foot fluorescent tub...

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What is CFM? CFM (Cubic Feet per Minute) is the standard of measure for devices such as ventilation fans. The higher number of CFM a fan has the more air it is able to move in a given period of time.

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