condition mean min max 0 h after light 11.46675 11.0316 11.9019 4 h after light 6.32059 6.22979 6.41139 8 h after light 5.444285 5.11935 5.76922 4 h after dark 6.65282 6.15125 7.15439 8 h after dark 8.60668 8.23083 8.98253 12 h after dark 10.03095 8.399 11.6629