Per the S&B website, the illumination dial has off positions between each of the markings:
The 6-36x56 PM II High Performance now features our new “LPI” which stands for the German words “Leucht-Parallaxe-Integriert” and means „Illumination Parallax Integrated“. This new and very easily operable illumination control is integrated into the parallax adjustment and allows a better mounting solution. It also enables a better left handed use. Although being very compact the illumination and the parallax adjustment show the familiar features: on the outer side the smaller and easy to operate illumination knob has 11 functional steps with “off” positions between each step.