condition mean min max 4 h after light 1368.5 1368.5 1368.5 8 h after light 1306.4 1285.6 1327.2 12 h after light 1342.65 1303.1 1382.2 4 h after dark 1354.9 1330.7 1379.1 8 h after dark 1131.2 1095.4 1167.0 12 h after dark 1183.1 1169.1 1197.1