condition mean min max 3 h after light 15.026 14.3034 16.2012 6 h after light 19.7038 17.0084 23.2057 9 h after light 20.9192 20.4195 21.294 12 h after light 21.970925 14.7067 25.4655 3 h after dark 28.899033333333335 26.9144 30.0299 6 h after dark 24.537233333333333 21.8679 25.9932 9 h after dark 19.929833333333335 17.5568 21.6247 12 h after dark 16.20415 15.7136 16.6947