condition mean min max 4 h after light 12.13909 6.87337 17.7319 8 h after light 10.72121 1.64373 19.3736 12 h after light 10.070640000000001 6.42292 12.695 4 h after dark 30.292966666666665 21.6801 35.9138 8 h after dark 21.5 14.0119 27.7433 12 h after dark 7.97271 4.64118 11.4274