condition mean min max 4 h after light 0.0 0.0 0.0 8 h after light 0.0 0.0 0.0 12 h after light 0.0 0.0 0.0 4 h after dark 0.0108141 0.0 0.0216282 8 h after dark 0.0 0.0 0.0 12 h after dark 0.010548 0.0 0.021096