Samsung UN46ES7500FXZA E-Manual page 451

Brightness Test complete. This means
there is enough light in the room for
Motion Controls to work properly.
(Appropriate ambient brightness: 50 —
500 Lux)
N
Avoid positioning the TV Camera
directly into sunlight or any other
illuminating light source.
Camera Angle
determine whether the TV Camera can
see you in order to use
Test: This will help
Motion Control.