[coin]

> And electric heat is much less efficient than natural gas

Not this argument again. Keep in mind that not everyone has natural gas heating. In my part of the country (Pacific Northwest), many homes are electric heat only. So during the winter time it's a zero sum game.

[ars]

"during the winter time" being the operative word. Deep cold in winter is about 3 month, and few more months of lesser heat.

But the light bulbs are used the entire year. Plus the light bulb is positioned suboptimally for heating - usually in the ceiling, or even worse in cans.

And people use A/C in the summer, so add about 1/3 to the energy waste.