condition mean min max 4 h after light 12.1343 10.7071 13.5615 8 h after light 9.22624 8.9366 9.51588 12 h after light 10.23376 9.80522 10.6623 4 h after dark 13.8179 13.3217 14.7042 8 h after dark 16.165133333333333 15.1119 17.5786 12 h after dark 15.022833333333335 14.1864 16.3169