condition mean min max 4 h after light 598.5 598.5 598.5 8 h after light 582.5 521.1 643.9 12 h after light 615.1500000000001 583.1 647.2 4 h after dark 654.8 578.0 731.6 8 h after dark 601.55 525.2 677.9 12 h after dark 422.0 394.4 449.6