Lexus LS 600h L 2012 Owner's Manual page 371

3-3. Using the interior lights
To prevent the 12-volt battery from being discharged
■
If the interior lights remain on when the door is not fully closed and the front interior
light switch (door position on/off) is on, the lights will go off automatically after 20
minutes.
Customization
■
Settings (e.g. The time elapsed before lights turn off) can be changed.
(Customizable features →P. 573)
368
Personal lights