/ Thesaurus / L Synonyms of light ballast Find synonyms for: Noun1. ballast, light ballast, electrical deviceusage: an electrical device for starting and regulating fluorescent and discharge lampsWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: pudgy Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language