Wiktionary
light out
vb. 1 (context slang dated English) To run away. 2 (context slang dated English) To seek to escape pursuit by fleeing.
Usage examples of "light out".
They went out in a body, with the exception of Leek, peering carefully before them as they went George turned the light out in the bar and they returned unmolested to the coffee-room, and, avoiding the sardonic smile of Leek, prepared to separate for the night.