http://www.autoexpress.co.uk/accessories-tyres/76760/car-bulbs-2013-group-test-headlight-reviews

"Above 60%"
1. Philips X-Treme Vision
2. Ring Xenonmax
3. GE Megalight Ultra +120
4. Osram Night Breaker Plus
5. Halfords Advanced Extreme Brillance
6. Bosch Plus 90
7. Ring Xenonultima
8. Halfords Advanced Ultra Brillance

"Up to +60%"
1. Philips VisionPlus
2. Ring ultraxenon
3. Osram Silverstar 2.0 (not the tinted stuff we have under the Sylvania name)
4. Halfords Advanced Super Brilliance