condition mean min max 4 h after light 420.1 420.1 420.1 8 h after light 398.45 377.9 419.0 12 h after light 469.4 433.3 505.5 4 h after dark 405.75 386.2 425.3 8 h after dark 427.9 384.7 471.1 12 h after dark 387.45 346.9 428.0