condition mean min max 2 h after light 11.551133333333333 9.477 15.2563 6 h after light 8.52427 7.43222 9.87357 10 h after light 9.492945 6.60888 12.9336 14 h after light 11.680769999999999 7.3119 15.2168 18 h after light 14.251416666666668 10.2659 19.7596 2 h after dark 8.142876666666666 5.89537 9.64207