i got tired of reading threads where people just guess at what the bulb is or what it looks like. what a waste of time reading through pages of threads where nobody knows shit!
i went and bought a new set of bulbs myself to see what can be done to make them invisible.
here's the bulb:
BMW OEM part:
Bulb under normal light:
Bulb in lower light (inside it's box):
as you can see, the bulb is already reflective, just not reflective enough. these bulbs are quite pricey, so i'm going to do some research before i test out something on the bulb.