condition mean min max 4 h after light 141.6 141.6 141.6 8 h after light 148.9 99.7 198.1 12 h after light 205.0 202.8 207.2 4 h after dark 185.25 166.3 204.2 8 h after dark 172.1 116.3 227.9 12 h after dark 177.05 149.3 204.8