Acura 2009 TL Owner's Manual page 110

Multi-Information Display
Auto Interior Illumination
While the headlight switch is turned
on, the interior lights gradually dim,
as the outside light level gets low.
You can customize at which outside
light level the lights start to dim.
There are MAX, HIGH, MID, LOW
and MIN levels and OFF for the auto
interior illumination settings.
If you want the illuminations to start
dimming as early as possible, select
MAX. For illuminations to start
dimming as late as possible, select
MIN. Choose HIGH, MID, or LOW
for levels in between.
To disable the auto interior
illumination function, select OFF.
104
You can choose this item to
customize from ''METER SETUP''
by pressing the INFO ( / ) button
repeatedly.
Press the SEL/RESET button to see
the selections.
Select the desired setting by
pressing the INFO ( / ) button,
then enter your selection by pressing
the SEL/RESET button.