condition mean min max 4 h after light 495.2 495.2 495.2 8 h after light 518.9 510.8 527.0 12 h after light 558.1 503.6 612.6 4 h after dark 499.59999999999997 473.9 525.3 8 h after dark 416.0 339.8 492.2 12 h after dark 404.25 403.3 405.2