condition mean min max 3 h after light 0.0 0.0 0.0 6 h after light 0.077039 0.0 0.231117 9 h after light 0.0 0.0 0.0 12 h after light 0.1075515 0.0 0.220455 3 h after dark 0.20338533333333333 0.0 0.339929 6 h after dark 0.0 0.0 0.0 9 h after dark 0.0 0.0 0.0 12 h after dark 0.0 0.0 0.0