condition mean min max 3 h after light 0.157568 0.0 0.472704 6 h after light 0.0 0.0 0.0 9 h after light 0.0 0.0 0.0 12 h after light 0.0 0.0 0.0 3 h after dark 0.0 0.0 0.0 6 h after dark 0.0 0.0 0.0 9 h after dark 0.139833 0.0 0.419499 12 h after dark 0.0 0.0 0.0