Light: Natural Light: (1) Daylight: Daytime light. Opinion of the police. Corrected by monthly hour tables (Britain ; Ireland in natural light variable prior to 1996). Value included in another value: daylight or twilight (Ireland, North Ireland). (2) Daylight or Twilight: Includes daylight, twilight. (3) Darkness: Period of the day when the lighting is dark. Opinion of the police. (4) Twilight: Period of half light between daybreak and sunrise, or between sunset and darkness. Opinion of the police