condition mean min max 4 h after light 6.355013333333333 5.39319 7.51075 8 h after light 5.69984 2.07001 9.93543 12 h after light 6.361243333333333 3.31885 9.64442 4 h after dark 7.37057 5.5007 9.41723 8 h after dark 7.372059999999999 5.47455 8.58856 12 h after dark 7.145286666666666 6.42943 7.53243