condition mean min max 4 h after light 0.1768185 0.0 0.353637 8 h after light 0.1918645 0.0 0.383729 12 h after light 0.2320805 0.0 0.464161 4 h after dark 0.3080635 0.305853 0.310274 8 h after dark 0.3065425 0.0 0.613085 12 h after dark 0.7067765 0.508182 0.905371