condition mean min max 4 h after light 0.9824825 0.558305 1.40666 8 h after light 0.837459 0.763179 0.911739 12 h after light 0.995613 0.738516 1.25271 4 h after dark 1.90066 1.70322 2.0981 8 h after dark 2.02632 1.95093 2.10171 12 h after dark 1.528815 1.44052 1.61711