Right I have tested the following 3 bulbs over the last few nights to check which is best. They are 3 of the main brands although I know there are loads of other ones like Osram, etc.
The bulbs were tested at pretty much the same light each night (thanks to my outdoor light sensor). I also had a little run around the Lickey Hills at this point to test the distance (not to look for dogging opportunities.............although 3rd car from the left is a winner, near the brown tangly bush)
I have 6500k PIAA LED's fitted so you can see those in the top corner of each shot to help you decide
Philips X-Treme 80%
These bulbs are certainly the most 'yellow' but are the clear winners in terms of distance gained. I have driven with these in for about 3 months now and was surprised to see just how well the lit the road compared to the others
Philips Blue Vision 4000k
Certainly didn't have the extra distance of the X-Treme bulbs on the road but did clearly have a better 'white' tint to them compared to the X-Treme bulbs
Ultra Blue 5000k
At a standstill these were the most 'white'. The pics clearly show how effective they were although I wasn't to impressed with night driving with them compared to the mighty X-Tremes, although the left bulb maybe needs re-adjusting a little.
VERDICT
For night driving and that extra bit of vision it has to be the X-Tremes, but for having the coolest set of H7 bulbs in 'ya hood' you can't look past the Ultras, they really did look impressive. The Blue Vision fell either side of the other 2. Not light enough to trouble the X-Tremes and not 'blue' enough to concern the Ultras.
That said i'm just about to order some 6000k HID's, as I still want a bit more........the bulbs are for sale if anyone is interested but only after my HID's have arrived
15.00 delivered for any pair
p.s. I know the garage door needs a paint!
The bulbs were tested at pretty much the same light each night (thanks to my outdoor light sensor). I also had a little run around the Lickey Hills at this point to test the distance (not to look for dogging opportunities.............although 3rd car from the left is a winner, near the brown tangly bush)

I have 6500k PIAA LED's fitted so you can see those in the top corner of each shot to help you decide
Philips X-Treme 80%
These bulbs are certainly the most 'yellow' but are the clear winners in terms of distance gained. I have driven with these in for about 3 months now and was surprised to see just how well the lit the road compared to the others


Philips Blue Vision 4000k
Certainly didn't have the extra distance of the X-Treme bulbs on the road but did clearly have a better 'white' tint to them compared to the X-Treme bulbs


Ultra Blue 5000k
At a standstill these were the most 'white'. The pics clearly show how effective they were although I wasn't to impressed with night driving with them compared to the mighty X-Tremes, although the left bulb maybe needs re-adjusting a little.


VERDICT
For night driving and that extra bit of vision it has to be the X-Tremes, but for having the coolest set of H7 bulbs in 'ya hood' you can't look past the Ultras, they really did look impressive. The Blue Vision fell either side of the other 2. Not light enough to trouble the X-Tremes and not 'blue' enough to concern the Ultras.
That said i'm just about to order some 6000k HID's, as I still want a bit more........the bulbs are for sale if anyone is interested but only after my HID's have arrived
15.00 delivered for any pair
p.s. I know the garage door needs a paint!