condition mean min max 4 h after light 275.5 275.5 275.5 8 h after light 292.75 277.0 308.5 12 h after light 320.35 276.5 364.2 4 h after dark 444.9 342.5 547.3 8 h after dark 553.45 553.4 553.5 12 h after dark 399.35 319.8 478.9