condition mean min max 0 h after light 3.924145 3.634 4.21429 4 h after light 5.32 4.59972 6.04028 8 h after light 7.63358 7.24795 8.01921 4 h after dark 6.3547 5.78636 6.92304 8 h after dark 4.8334 4.7925 4.8743 12 h after dark 2.0825 1.50583 2.65917