Are halogen bulbs more, less or equally energy efficient as incandescent bulbs per lumen?
Halogen bulbs are much more efficient, lasting sometimes 3 times longer than ‘normal’ bulbs and generating more light for the same amount of imput power.
I’ve seen figures where these bulbs are from 3 to 5 times more efficient.
But AFAIK they’re more expensive with may put people off buying them in the first place.