condition mean min max 3 h after light 0.0 0.0 0.0 6 h after light 0.0 0.0 0.0 9 h after light 0.0 0.0 0.0 12 h after light 0.020870975 0.0 0.0834839 3 h after dark 0.0 0.0 0.0 6 h after dark 0.043933 0.0 0.131799 9 h after dark 0.022555833333333334 0.0 0.0676675 12 h after dark 0.0 0.0 0.0