condition mean min max 4 h after light 67.2 67.2 67.2 8 h after light 66.55 63.6 69.5 12 h after light 168.9 100.5 237.3 4 h after dark 289.55 276.6 302.5 8 h after dark 276.55 196.8 356.3 12 h after dark 172.4 119.7 225.1