9001KM40 SQUARE D/TELEMECANIQUE PUSH BUTTON PILOT LIGHT SELECTOR SWITCH ACCESSORIES. 30MM LIGHT MODULE FULL VOLTAGE. A 9001KM40 full voltage light module can be used with any voltage lamp and it is a true direct supply light module. , however, Square D does not supply the lamp. Note: There are no resistors in it to drop the voltage, so it can be used with any voltage lamp up to 120 volts. Highter voltage lamps are not recommended due to heat, the lens will melt.