Is fluorescent lighting harmful to my eyes?

The coil is the windings of copper or aluminum wire surrounding the steel core in a ballast. It also refers to the entire assembly comprising the inductor or transformer.

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Full Spectrum Lighting is a marketing term, typically associated with light sources that are similar to some forms of natural daylight (5000K and above, 90+ CRI), but sometimes more broadly used for lamps that have a smooth and continuous color spectrum.

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The efficiency of a light source is simply the fraction of electrical energy converted to light, i.e. watts of visible light produced for each watt of electrical power with no concern about the wavelength where the energy is being radiated. For example, a 100 watt incandescent lamp converts 7% of the electrical energy into light; discharge lamps convert 25% to 40% into light.

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The general term applied to fluorescent lamps that are single-ended. Some CFLs have integral ballasts and medium or candelabra screw bases for easy replacement of incandescent lamps.

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Task lighting refers to any light source designed specifically to direct light onto some "task" performed by a person or machine.

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