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 0.0 0.0 0.0 6 h after dark 0.044138666666666666 0.0 0.132416 9 h after dark 0.07506733333333333 0.0 0.225202 12 h after dark 0.118189 0.0 0.236378