ballast lamp

ballast lamp

[′bal·əst ‚lamp]
(electricity)
A light-producing electrical resistance device which maintains nearly constant current by increasing in resistance as the current increases.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Ballast Luminous Efficiency = (Total test ballast lamp arc power/Ballast input power)x?