condition mean min max 2 h after light 3.1989133333333335 2.7103 3.49133 6 h after light 3.59128 3.51435 3.7165 10 h after light 4.24369 3.5248 4.8227 2 h after dark 5.13554 4.56121 5.6522 6 h after dark 7.7625 7.70574 7.82024 10 h after dark 9.40045 7.64563 10.6097