With the announcement of Face ID, I wonder, will work in the dark? For example, a dark room? Does the screen allow enough light for it to work?

2 Answers 2


Face ID works in the dark thanks to the flood illuminator. This means Face ID is not dependent on external light sources or purely the light emitted from the display.

Flood Illuminator

Invisible infrared light helps identify your face even when it’s dark.



Depends if it is really dark Face ID is likely not to work even Face ID needs lots of light to work even with a flashlight you still need extremely high light so the likely answer is a simple NO

  • Please see the accepted answer for why the answer is wrong (or just go into a dark room with your iPhone and use FaceID to unlock it).
    – nohillside
    Commented Mar 14 at 22:21

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