condition mean min max 4 h after light 9.415603 8.945966 9.88524 8 h after light 8.9699615 8.046248 9.893675 12 h after light 8.6953375 8.473305 8.91737 4 h after dark 8.3832105 7.820455 8.945966 8 h after dark 10.656216 8.945966 12.366466 12 h after dark 8.337725 8.337725 8.337725