Chevrolet 1995 Lumina Owner's Manual page 92

Rearview Mirror Reading Lamps
These lamps go on when you open the doors. When the
doors are closed, turn the lamps on and off with the
switches.
Mirrors
Adjust all the mirrors so you can see clearly when you
are sitting in a comfortable driving position.
Inside Daymight Rearview Mirror
To reduce glare from lamps behind you, move the lever
to the night position.
2-36