condition mean min max 4 h after light 12.54075 12.3529 12.7286 8 h after light 14.00425 13.6102 14.3983 12 h after light 15.955649999999999 14.406 17.5053 4 h after dark 27.50645 25.3685 29.6444 8 h after dark 21.87485 21.298 22.4517 12 h after dark 18.08365 17.7821 18.3852