Lexus 2016 GS350 Owner's Manual page 349

Illuminated entry system: The lights automatically turn on/off according to engine
●
switch mode, the presence of the electronic key, whether the doors are locked/
unlocked, and whether the doors are opened/closed.
If the interior lights remain on when the engine switch is turned off, the lights will go off
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automatically after 20 minutes.
Setting (e.g. the time elapsed before lights turn off) can be changed.
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(Customizable features: P. 568)
NOTICE
To prevent battery discharge, do not leave the lights on longer than necessary when the
engine is off.
GS350_200t_GS F_OM_OM30E86U_(U)
5-3. Using the interior lights
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