Davedaveda : Osram Night Breakers are a good bulb, but the life of them is about 200 to 300 hours.
Blake : you can get H4 HID Conversions they price around 300 to 600 quid. But if you don't want to spend that sort of money you can get Xenon plus with is upto 30% brighter or Ultra Xenon which is upto 60% brighter.
I would know all of this stuff about bulbs as I work with them everyday.
