condition mean min max 4 h after light 698.5497045 549.129091 847.970318 8 h after light 653.504959 607.15766 699.852258 12 h after light 788.2889325 734.483395 842.09447 4 h after dark 722.163905 687.548148 756.779662 8 h after dark 740.973724 726.023084 755.924364 12 h after dark 908.962968 908.962968 908.962968