Plenty of visible light out of the front on the photos I have used LED bulbs on a car and noticed that when they fail they start to flash, Mr Plod was not amused, best regards, Ian.
All LED's flash but it's so bloody fast we can't see it, have you ever noticed on recordings of slow motion you see lights on certain vehicles flashing, that's LED. When they start to fail they slow down and that's what upsets Mr Plod!