My laptop has face recognition log in built into it.
It works.... in one spot of the house about 50% of the time. The vast majority of times in other locations I end up bypassing it because it simply wont work.
The lighting has to be just right, your distance from the camera has to be just right, the tilt of your head has to be just right, take off your glasses, remove your hat.. etc etc.
Oh and whats with "LED's not required" my track IR never used leds
