LUMOTAST 75 Switches RAFI LUMOTAST 75 Switches feature a wide range of collar shapes in a classical design. The switches are suitable for high currents (maximum 250V/4A) and are available in 1 NC +1 NO or 2 NC + 2 NO contact configurations. RAFI LUMOTAST 75 Switches include illuminated pushbuttons, signal lamps, and keylock switches.