condition mean min max 0 h after light 0.0 0.0 0.0 4 h after light 0.0 0.0 0.0 8 h after light 0.365585 0.0 0.73117 4 h after dark 0.3527235 0.0 0.705447 8 h after dark 0.0 0.0 0.0 12 h after dark 0.0 0.0 0.0