condition mean min max 4 h after light 1187.5 1187.5 1187.5 8 h after light 1130.55 949.6 1311.5 12 h after light 1371.65 1306.6 1436.7 4 h after dark 1233.65 866.7 1600.6 8 h after dark 1216.45 1056.4 1376.5 12 h after dark 1212.3 979.0 1445.6