condition mean min max 0 h after light 7.27754 6.74181 7.81327 4 h after light 9.556270000000001 8.47174 10.6408 8 h after light 8.69865 7.97783 9.41947 4 h after dark 12.22915 11.6847 12.7736 8 h after dark 9.996525 8.79645 11.1966 12 h after dark 8.08859 7.52485 8.65233