Electrical ballast - Wikipedia, the free encyclopedia
An electrical ballast (sometimes called control gear) is a device intended to limit the amount of current in an electric circuit. Ballasts vary greatly in complexity.

Ballast - Home - The Official Website of the film Ballast
Ballast, a film by Lance Hammer, winner of the directing and cinematography awards in the 2008 Sundance Film Festival dramatic competition. Opening October 17 in select theaters.

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The ballast manufacturer leader in fluorescent and HID lighting ballasts for commercial and industrial lighting.

ballast definition | Dictionary.com
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Ballast - Wikipedia, the free encyclopedia
Ballast may mean: Track ballast, railway track-bed, on which sleepers and track is laid; Sailing ballast, ship's ballast, used to weight a ship down; Ballast tanks, a device used ...