condition mean min max 0 h after light 6.61213 5.17502 8.04924 4 h after light 9.61655 9.29707 9.93603 8 h after light 12.72305 11.7219 13.7242 4 h after dark 14.6708 12.7565 16.5851 8 h after dark 10.1012 10.0089 10.1935 12 h after dark 8.183545 6.25609 10.111