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 0.164492 0.0 0.493476 12 h after light 0.0630375 0.0 0.25215 3 h after dark 0.13112833333333332 0.0 0.393385 6 h after dark 0.0 0.0 0.0 9 h after dark 0.28480733333333336 0.0 0.854422 12 h after dark 0.0 0.0 0.0