OEM led lights

[HILO]

I have noticed, mostly on top gear, that factory led tail and drls flash on camera. I have seen this on a YouTube video of a bugati veron in Dallas. Anyone else notice this? I think it must be something about the led bulbs flickering faster than we can process, and fitting caught in shutter speed.

 

[nerdly_dood]

It's one way to cause the lights to appear less bright - taillights on newer Cadillacs often will do this. Just move your eyes side-to-side quickly when you see one with the taillights on (NOT brakes, those are brighter so they don't do the fast flicker thing) and you'll sort of see what i mean.

 

[Henry455]

Its called pulse width modulation (PWM), efficient way to control brightness of an LED without power robbing resistors. Same technology is used to control the speed of some DC motors.