When they are on; tail and stop lights are red, indicators amber and headlights, parking lights and reversing lights are white.
From Vic gov vehicle standards information (as an example):
- Generally, all motor vehicles must be fitted with functional headlamps, stop lamps, front and rear position (parking) lamps, a number plate lamp and turn signal lamps emitting light of the specified colour
So, if you were to put tint film on headlights, as long as they emit a white light when turned on, it should be fine.
HOWEVER...
Even if the light looks white to you through the tint (as headlights should emit white) it's still possible that the light emitted is not within the range permissible by law.
Only by testing with specialised instruments will they know for sure if your headlight is emitting the correct light range.
Therefore, even IF the headlight still emits white light and the right light range, its still possible you will most likely get defected by police since its not their job to do the scientific testing of your headlights. They will simply see a modification to your vehicle headlight which may affect safety and give you a defect notice.
It's at that point you will have to get it tested properly and then you will find out for certain if they emit the right light range. If they don't, then you'll have to remove the tint and you'll be out of pocket for the tint AND the fee for clearing the defect notice.
From my perspective, it's a near certainty you will get defected, not if but when. Do you really want to go through the trouble of having to get it tested? And in all probability, it will fail anyway and you'll have to remove the tint.
SOLUTION: If you really want to darken your headlights, then the best option is to open them up and get the inner reflective surface painted (black chrome preferably) because then the outer casing is still transparent as it was from the factory and the light emitted won't be affected as it won't be passing through tint.
I suggest black chrome because some of the light intensity from the headlights is due to the reflection from the inner chromed surfaces, and a black chrome will at least retain some of that.
Even with that, its still a possibility you could be defected but much less likely because they'll see the external clear casing hasn't been interfered with at all when they look closely AND a lot of cars from factory have blackened internal areas anyway, so surely most police will just assume its OEM.
Plus it helps that blacked out headlights were an option for these cars from factory anyway
The first pic is the factory option from a Mk.2 RCZ, and the second pic is from someone on this forum who blackened their headlights internally;
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