What is Egress Lighting?

What might be meaning of Egress Lighting in an automotive application?

I work on a Slave Electronic Control Unit.  It's Microcontroller based.  
A request has recently come up for the this slave unit to support time delayed access/egress lighting.

Thank you!
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naseeamAsked:
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Dave BaldwinFixer of ProblemsCommented:
"Egress" is when you get out of the car.  "Ingress" would be getting in.  So they want the lights to stay on while they get out of the car but turn off a little afterwards.  Probably a delay on the door closing.
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slightwv (䄆 Netminder) Commented:
I would take it literally:
How much time after you exit the vehicle and close/secure the vehicle.

http://www.merriam-webster.com/dictionary/egress

1: the action or right of going or coming out
2: a place or means of going out : exit
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naseeamAuthor Commented:
Exactly the anwer we needed.
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