condition mean min max 4 h after light 7.31732 3.76225 11.7244 8 h after light 5.39006 1.28835 9.72031 12 h after light 6.72157 3.15709 10.3878 4 h after dark 9.85675 5.95145 12.51 8 h after dark 8.028833333333333 5.42097 9.78006 12 h after dark 8.841866666666666 6.73471 10.9693