condition mean min max 4 h after light 4.47456 3.3088 5.64032 8 h after light 2.2965999999999998 2.19962 2.39358 12 h after light 2.66493 2.43458 2.89528 4 h after dark 2.993525 2.93509 3.05196 8 h after dark 4.650535 4.37371 4.92736 12 h after dark 6.511835 6.21782 6.80585