condition mean min max 0 h after light 16.5445 16.0639 17.0251 4 h after light 1.1841605 0.806851 1.56147 8 h after light 1.094198 0.979286 1.20911 4 h after dark 1.461285 1.361 1.56157 8 h after dark 1.763785 1.3648 2.16277 12 h after dark 6.779745 3.67448 9.88501