condition mean min max 4 h after light 14.13905 12.1281 16.15 8 h after light 10.3724 10.2002 10.5446 12 h after light 11.16045 10.8954 11.4255 4 h after dark 15.142 14.6421 15.774 8 h after dark 17.838666666666665 17.1134 18.9682 12 h after dark 13.336933333333333 13.033 13.9366