lead-lag ballast

lead-lag ballast

[¦lēd ′lag ‚bal·əst]
(electricity)
A ballast for a pair of fluorescent lamps, one operating on leading current and the other on lagging current, to diminish the stroboscopic effect.

lead-lag ballast

A ballast for two fluorescent lamps, one of which operates on leading current and the other on lagging current; tends to reduce the stroboscopic effect.