Upgraded dipped and main beam to use Philps XTreme Power Bulbs at the weekend, 2 packs of 2 X H7 12V 55W bubs £45 from Amazon.co.uk.
I'd say there was a signifficant difference in brightness over the OEM halogen bulbs that come with the Z, the light is brighter, and much "whiter" too, definently give me more confidence on unlit roads. Of course there not as strong as Xenon's but for a fraction of the cost i'd definently recomend them. Changing both sets took about 30mins, the main beams are the hard ones to get to, you need small hands!
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I'd say there was a signifficant difference in brightness over the OEM halogen bulbs that come with the Z, the light is brighter, and much "whiter" too, definently give me more confidence on unlit roads. Of course there not as strong as Xenon's but for a fraction of the cost i'd definently recomend them. Changing both sets took about 30mins, the main beams are the hard ones to get to, you need small hands!
e