question about remove blue coating on the bulbs

on a +1xx% bulb we can see some kind of blue band , from my knowledge it makes bulb put more light on the important part of road and at the same time make sure the total lumen output doesn't exceed restriction, for a H4 bulb that is no more than 1150lumen on low beam, so my question is if i use a knife to remove this blue coating to get more output, is it going to lose uv block function, i mean what kind of method have been used to block UV, on the philips's webpage it talks about the use of UV-Quartz glass, what about osram, also UV-Quartz glass or maybe some kind of coating? and i live in germany,is this modification against law. i'm sorry about my english, i hope you get my point.

Don't! Halogen bulbs are under pressure. (You'll need eye protection if you do.)

Maybe better to remove with acid or aceton?

RR187 said:

at the same time make sure the total lumen output doesn't exceed restriction

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Correct. For this reason, removing the coating could endanger yourself and others by increasing glare.

Don't do this.

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