What is the minimum standard for lighting for exit paths in an industrial setting? (Lumens)?

Answer 1

http://www.portlandonline.com/auditor/index.cfm?a=hjiji&c=diebf
http://www.labsafety.com/refinfo/ezfacts/ezf265.htm
It seems to be different for different states.
I googled: exit path lighting industrial lumen standards

There are 51000 entries, you might find ur answer there.