ballast factor


Also found in: Acronyms.

ballast factor

[′bal·əst ‚fak·tər]
(electricity)
The ratio of the luminous output of a lamp when operated on a ballast to its luminous output when operated under standardized rating conditions.

ballast factor

The ratio of the luminous output of a lamp when operated on a ballast to its luminous output when operated under standardized rating conditions.
References in periodicals archive ?
14 ballast factor for an energy saving lighting change-out--regardless of the ceiling height--I shudder.
However, it is true that this process factors out the effect of the ballast factor as the readings are typically normalized to the manufacturer's initial lumen rating of the lamps in a relative photometry report.