What is a High Efficiency Magnetic Ballast?

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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Lamps that are approved for burning in open fixtures (as opposed to enclosed fixtures which have an acrylic lens or plate glass enclosure).

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Why do fluorescent lamps need a ballast? Ballasts are used to regulate the current in the lamp. Current needs to be regulated in order to supply the right amount of power needed to make the arc, and thus the light, in a fluorescent lamp. Fortunately, the current is lower than that needed for a typical incandescent. This is the reason why the fluorescent lamps can provide the same light output for less energy than typical incandescent.

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The standardized part number used by the US Government for procurement.

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HPS means High Pressure Sodium.  HPS lamps are high intensity discharge light sources that product light by an electrical discharge though sodium vapor operating at relatively high pressures and temperatures. 

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