condition mean min max 4 h after light 582.3 582.3 582.3 8 h after light 549.1 513.0 585.2 12 h after light 677.9 634.4 721.4 4 h after dark 502.20000000000005 481.7 522.7 8 h after dark 403.0 349.3 456.7 12 h after dark 419.95 396.0 443.9