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 0.0 0.0 0.0 3 h after dark 0.073965 0.0 0.221895 6 h after dark 0.0 0.0 0.0 9 h after dark 0.11337066666666668 0.0 0.340112 12 h after dark 0.0 0.0 0.0