condition mean min max 4 h after light 9.00686 9.00156 9.01216 8 h after light 10.15295 10.1029 10.203 12 h after light 10.243345000000001 9.83299 10.6537 4 h after dark 17.3657 15.7357 18.9957 8 h after dark 13.4069 12.8712 13.9426 12 h after dark 11.6578 11.1798 12.1358