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 0.036947 0.0 0.110841 3 h after dark 0.037954 0.0 0.113862 6 h after dark 0.039088 0.0 0.117264 9 h after dark 0.0 0.0 0.0 12 h after dark 0.0 0.0 0.0