Just fitted some of these to the 500 and very impressed. The standard bulbs leave a lot to be desired.About 90% of our driving is on B roads or unclassified and the dipped beam on the original lights was simply dangerous. I got them for £18.50 from Philips RacingVision +150% H7 headlight bulb 12972RVS2, twin pack - chrome: Amazon.co.uk: Car & Motorbike although the price has gone up a bit since last week. But highly impressive they are even at the increased price

I've got Philips extreme +130% and they are very good in our non projector head lights, if yours are the projector type like on my Mazda I can understand their poor performance.

I fitted a set of Philips Racing Vision over 12 months ago.
I've been very impressed as well. I was concerned about the reduced warranty (6 months), but they have lasted very well.
I've probably just cursed them.....��

I've had Phillips bulbs in the past, but they didn't seem to last that long. Since then I've stuck to Osram nightbreakers. Got the lasers in my 500s now, and they're superb.