I thought I'd try a different type of headlight bulb after one of the HID units lost a connector. Many on the forums recommend Philips Xtreme Vision bulbs, so I got some from the UK. They are touted as 100% more light than a standard H7.
They are around 3400k in colour, so are more yellow than the 6000K HIDs but our eyes are evidently designed to use that frequency range (similar to sunlight). The vision is good, and as a non-HID bulb are very good. I like them.