condition mean min max 4 h after light 6.924989999999999 6.03177 7.81821 8 h after light 9.123149999999999 9.09447 9.15183 12 h after light 12.6436 11.7399 13.5473 4 h after dark 14.493766666666668 13.6552 15.4728 8 h after dark 13.489966666666666 13.2191 13.9563 12 h after dark 8.813143333333334 8.2589 9.52298