finally more light

Certainly, one must wonder not expect. There are also physical limitations. At the temperature of Xenon light can not rankommen nunmal.
But compared to a standard H7 halogen bulb you get even more light on the road. However, one should bear in mind that most probably no "standard H7 lamp" drive more. Therefore, the profit is certainly not 90%. But the lamp brings more light on the road, much more. In particular, the illumination right to Fahrabhnrand out has become much better. It has become compared to the old lamps really bright.

As white as the light is not described. In my eyes, but that is not tragic. White light is indeed first "beautiful" to look at, but the road is wet, the view with very white pear is hands down worse than the normal "yellow".

For me it's more light and therefore more safety and not primarily to optics while driving. This can be achieved with these lamps. So I'm happy with them.
For life I can not say anything yet. There are highly bred halogen lamps that have a gas filling and are under pressure they are just very sensitive and the life not as high as standard bulbs. Here you should therefore pay much attention not to touch the glass bulb or so to offend somewhere. This shortens the life addition.

In any case, you should compare when searching here on Amazon. The Night Breaker are repeatedly offered, with the same base, but quite to very different prices.