condition mean min max 4 h after light 526.6 526.6 526.6 8 h after light 585.2 568.3 602.1 12 h after light 683.7 512.0 855.4 4 h after dark 570.3 505.5 635.1 8 h after dark 670.1 581.5 758.7 12 h after dark 557.8 451.6 664.0