Upgrading to the Osram Night Breaker +90 in the Golf makes a reasonable difference to the throw of the lights and a substantial difference to the colour.
Osram claim up to 90% more light and up to 10% whiter light which from what I can see is pretty accurate.
The standard globes fitted to the Golf were reasonable but could certainly be improved, I would recommend taking optional bi-xenon lights where possible but unfortunately in my case I ended up having to settle for a car without them or face an additional 3-4 months delay.
It’s hard to show the difference the light makes in photos but you can see the difference in output and throw clearly when you’ve changed one globe. The comparative picture from Osram shows the difference between standard and the Nightbreaker +90’s.
Overall I would estimate the additional output/throw to increase the distance from which you can see to be around 20%.
These globes were purchased from Powerbulbs who offer free shipping worldwide.
At the same time I fitted the Philips BlueVision W5W globes to replace the parking lights which were quite yellow looking. These were included free with the order from Powerbulbs and make a big difference.