I haven’t looked at my tail lights, but in the US most cars have used the same bulb for hazard and brake. So the bulbs are already fully illuminated. Cars mea

I haven’t looked at my tail lights, but in the US most cars have used the same bulb for hazard and brake. So the bulbs are already fully illuminated. Cars meant for the rest of the world have separate yellow lights in back and you could flash those. I think they are adding a rapid burst flash for alert with those.