condition mean min max 4 h after light 314.9 314.9 314.9 8 h after light 491.4 231.2 751.6 12 h after light 510.65 480.7 540.6 4 h after dark 619.05 269.7 968.4 8 h after dark 435.9 405.0 466.8 12 h after dark 643.6 343.0 944.2