condition mean min max 4 h after light 12.9306 12.4191 13.4421 8 h after light 10.22605 9.5613 10.8908 12 h after light 13.9016 13.6677 14.1355 4 h after dark 14.8697 13.628 16.1114 8 h after dark 15.4545 15.3462 15.5628 12 h after dark 14.35745 14.1134 14.6015