condition mean min max 4 h after light 1.34018 0.90665 1.77371 8 h after light 0.966981 0.758192 1.17577 12 h after light 0.9193095 0.850958 0.987661 4 h after dark 1.40668 1.11567 1.69769 8 h after dark 1.032752 0.877434 1.18807 12 h after dark 1.378365 1.19719 1.55954