condition mean min max 0 h after light 16.0549 15.4013 16.7085 2 h after light 5.59457 5.0233 6.16584 4 h after light 5.059355 4.85237 5.26634 8 h after light 5.231055 4.79039 5.67172 12 h after light 5.311895 5.03622 5.58757 2 h after dark 8.735935 7.88458 9.58729 4 h after dark 8.945435 8.72096 9.16991 8 h after dark 12.18455 11.5486 12.8205 12 h after dark 15.42455 15.0382 15.8109