Well first I upgraded my bulbs to PIAA Xtreme WHite
http://www.mazda2forums.co.uk/forum/index.php/topic,638.0.htmland the result in visibility are amazing!
Mind you thought whiter colors are not very good for use in foggy conditions.
I also a month ago added the front foglamps! Bought them online and fitted them with a friend!
I upgraded their bulbs to PIAA Xtreme white! I mostly add the for beauty as I didn't like the pastic covers on the sport bumper.
They add a bit of visibility right in front of the car. I didn't test them a lot in foggy conditions only once but the headlights did more work for me
