I don't know if this is very new but last week I saw the solution to the dilemma of clear indicator glass that a lot of new cars (or cutomized cars) have.

You see, up until recently all you could buy for this were the amber bulbs. Because the mirror inside the indicator is completely focussed on the center of the bulb, the indicator would STILL be orange!

Now they have coated the bulb with a oneway mirror, so it looks like a chrome bulb (hence no amber in the indicator) but the amber glas is still underneath it and when the bulb lights, it's still legal! (maybe not in some states or countries, so be aware)...