condition mean min max 4 h after light 0.0 0.0 0.0 8 h after light 1.30556 0.0 2.61112 12 h after light 4.230055 0.0 8.46011 4 h after dark 0.0 0.0 0.0 8 h after dark 9.728485 8.38087 11.0761 12 h after dark 6.658455 2.31561 11.0013