condition mean min max 0 h after light 153.8 152.425 155.175 4 h after light 113.1925 109.815 116.57 8 h after light 103.312 102.505 104.119 4 h after dark 107.983 103.55 112.416 8 h after dark 132.8945 129.075 136.714 12 h after dark 132.984 129.508 136.46