condition mean min max 4 h after light 551.084022 540.36151 561.806534 8 h after light 493.5652625 467.360007 519.770518 12 h after light 546.348564 530.890594 561.806534 4 h after dark 613.6276379999999 586.30898 640.946296 8 h after dark 603.4849095 596.677776 610.292043 12 h after dark 613.385346 613.385346 613.385346