In article ,
Clive Mitchell writes:

Halogen lamps are MORE efficient than common lamps but less efficient
than compact fluorescent lamps.

The lamps themselves are, but lighting a room by indirect light
reflected off the floor is horribly inefficient. It's common to
find a kitchen with 500W of halogen downlighters that has a much
lower level of illumination everywhere that matters than you
get from hanging a 60W lamp in the middle of the room.

--
Andrew Gabriel