condition mean min max 0 h after light 6.120715000000001 6.11526 6.12617 4 h after light 8.057735000000001 6.79745 9.31802 8 h after light 5.85458 5.65905 6.05011 4 h after dark 5.47291 4.36797 6.57785 8 h after dark 9.075679999999998 8.21286 9.9385 12 h after dark 4.091335 1.66556 6.51711