condition mean min max 4 h after light 278.7 278.7 278.7 8 h after light 384.95 378.9 391.0 12 h after light 425.55 418.8 432.3 4 h after dark 486.05 465.8 506.3 8 h after dark 555.55 463.5 647.6 12 h after dark 411.85 351.7 472.0