condition mean min max 4 h after light 121.2 121.2 121.2 8 h after light 105.9 102.4 109.4 12 h after light 96.75 64.4 129.1 4 h after dark 97.45 80.7 114.2 8 h after dark 128.4 126.7 130.1 12 h after dark 101.30000000000001 99.9 102.7