[muawiyah]

Virtually ALL of the savings possible in the national grid with fluorescent lights were attained decades back.

By the time Congress got around to worrying about lightbulbs MOST residential use was in fluorescent lights as well.

The error in your thinking is that residential usage consists of mostly lighting. Actually it's heating, cooling and cooking. Lighting usage is negligible!

[rlmorel]

If you look at the graph, the other two lines leading into residential use are Gas (4.87% of all energy use is gas usage going directly to residential uses, heating, dryers, stoves, etc) and Oil (1.16% of all energy use is oil usage going directly to homes as heating oil) both of which don’t contribute to lighting.