condition mean min max 0 h after light 17.987099999999998 17.9469 18.0273 4 h after light 21.99835 21.7614 22.2353 8 h after light 22.793950000000002 22.7937 22.7942 4 h after dark 21.39265 20.5819 22.2034 8 h after dark 20.07465 18.5518 21.5975 12 h after dark 17.96725 17.0461 18.8884