condition mean min max 4 h after light 251.1 251.1 251.1 8 h after light 228.4 212.3 244.5 12 h after light 160.95 133.3 188.6 4 h after dark 237.7 127.1 348.3 8 h after dark 243.4 196.5 290.3 12 h after dark 187.45 185.0 189.9