People with S40's V50s C30s....I posted this years ago but seeing as though the nights have now drawn in and these headlights are still crappy.....
Your projector lenses are almost certainly dirty.
Look close and you will see they are covered with a milky film that reduces the light output.
You can
easily take the lenses out and clean them... Improves brightness, spread of light and gives a much nicer sharp cutoff.
SIDE NOTE: If you're feeling
fruity, you can replace those glass lenses with CLEAR glass lenses for maximum light and amazing cut off (notice the original lenses have a frosted effect). See below link:
http://www.theretrofitsource.com/kno...earlenses.html
As you know, you can remove the whole headlamp assembly just by removing a metal pin (looks like a tent peg) what an ingenious design by Volvo!.
Original article here...