condition mean min max 4 h after light 10.08879 9.41488 10.7627 8 h after light 9.350355 9.192 9.50871 12 h after light 9.93566 9.84482 10.0265 4 h after dark 11.8429 10.5412 12.9727 8 h after dark 10.11238 8.47474 11.1792 12 h after dark 10.843616666666666 8.72645 12.8692