condition mean min max 4 h after light 6133.1 6133.1 6133.1 8 h after light 3679.85 1705.0 5654.7 12 h after light 1446.65 991.1 1902.2 4 h after dark 2314.1499999999996 1106.6 3521.7 8 h after dark 3101.3 2987.0 3215.6 12 h after dark 4022.65 3872.5 4172.8