condition mean min max 4 h after light 21.731499999999997 20.2949 23.1681 8 h after light 17.26095 16.7955 17.7264 12 h after light 13.8241 12.8819 14.7663 4 h after dark 12.7608 10.783 14.1509 8 h after dark 16.607766666666667 15.6041 17.9785 12 h after dark 16.636 15.8241 17.8981