condition mean min max 4 h after light 696.9 696.9 696.9 8 h after light 812.2 762.4 862.0 12 h after light 1006.9000000000001 842.4 1171.4 4 h after dark 1284.55 1128.0 1441.1 8 h after dark 1426.1 1360.4 1491.8 12 h after dark 1187.6 1079.6 1295.6