condition mean min max 4 h after light 9.4066495 8.956987 9.856312 8 h after light 7.888189000000001 7.642599 8.133779 12 h after light 8.6195515 8.321733 8.91737 4 h after dark 8.693375 8.46938 8.91737 8 h after dark 9.082049 8.325545 9.838553 12 h after dark 8.91737 8.91737 8.91737