A California federal judge on Thursday ordered a light bulb maker to pay $21 million for exaggerating the performance of its LED bulbs, handing the Federal Trade Commission a significant victory in its quest to crack down on deceptive advertising claims.

The FTC sued Lights of America Inc. and its two owners in U.S. District Court for the Central District of California in September 2010, alleging the company overstated the light output and life expectancy of its Light Emitting Diode, or LED, bulbs on packages and in brochures.