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 0.13751533333333335 0.0 0.412546 9 h after dark 0.124238 0.0 0.372714 12 h after dark 0.0 0.0 0.0