condition mean min max 4 h after light 502.1 502.1 502.1 8 h after light 494.35 462.1 526.6 12 h after light 730.1 498.3 961.9 4 h after dark 716.45 619.2 813.7 8 h after dark 734.6 493.0 976.2 12 h after dark 874.3499999999999 869.8 878.9