condition mean min max 4 h after light 108.5 108.5 108.5 8 h after light 121.25 96.4 146.1 12 h after light 183.7 151.9 215.5 4 h after dark 312.1 292.4 331.8 8 h after dark 346.85 269.5 424.2 12 h after dark 280.3 187.3 373.3