condition mean min max 4 h after light 704.9 704.9 704.9 8 h after light 606.15 508.5 703.8 12 h after light 431.3 318.4 544.2 4 h after dark 527.7 481.2 574.2 8 h after dark 540.05 476.5 603.6 12 h after dark 608.0 576.1 639.9