condition mean min max 4 h after light 2.941569 2.83995 3.119457 8 h after light 2.144469 1.533859 2.4939400000000003 12 h after light 2.0768393333333335 1.340846 3.345507 16 h after light 2.908516 2.484871 3.445914 4 h after dark 2.847188 2.170258 3.6993519999999998 8 h after dark 1.579234 1.549826 1.59885