condition mean min max 0 h after light 6.17784 5.63364 6.72204 4 h after light 4.834709999999999 4.78355 4.88587 8 h after light 7.69072 7.43387 7.94757 4 h after dark 10.12545 10.0726 10.1783 8 h after dark 8.812845 8.57952 9.04617 12 h after dark 6.5348500000000005 6.10967 6.96003