lights out
verb
Definitions
To go away or depart, especially in haste or without notice.
Example: the outlaws lit out for the border
noun
Definitions
Unconsciousness.
noun
Definitions
The time at night at which artificial lights are to be turned off, a curfew or bedtime.
The prescribed bedtime for persons living in a boarding school or staying in a hospital.
Example: We were all expected to be in bed by lights-out.