condition mean min max 4 h after light 8.675426999999999 8.417601 8.933253 8 h after light 9.182628999999999 8.736913 9.628345 12 h after light 8.8298745 8.573861 9.085888 4 h after dark 8.377667 8.181473 8.573861 8 h after dark 7.4499344999999995 6.890412 8.009457 12 h after dark 9.114524 9.114524 9.114524