Samsung PN60E8000 E-Manual page 97

You can test the brightness of room
and the camera angle.
This test checks to
see if your room is bright enough
f o r ,;:: _ _:::::_ / to wo r k p ro pe rl y.
Select using your remote. The
test starts and takes a few seconds.
(Appropriate ambient brightness: 50
- 500 Lux)
illuminating
lights directly into
sunlight