Beginning Tuesday, under federal law, 75-watt incandescent bulbs can no longer be produced or imported.
Retailers can still sell existing stock until they run out.
The government is gradually phasing out incandescent bulbs in favor of more energy-efficient, LEDs, halogens or compact fluorescent bulbs.
100-watt incandescent bulbs were retired last year.
Traditional 60 and 40-watt bulbs will be phased out in 2014.