An information handling system projector lamp housing includes a safety interlock to reduce the risk of electrical shock to an end user during lamp insertion and removal. A ballast disposed in the projector interfaces with a low voltage power supply through a ballast power supply circuit and transforms the low voltage into high voltage for use by the lamp. A connector associated with the ballast connects with a connector on the lamp housing to supply the high voltage to the lamp. The safety interlock breaks the ballast power supply circuit if the ballast connectors are exposed, such as during insertion or removal of the lamp. The safety interlock completes the ballast power supply circuit as the lamp housing fully inserts in the projector to allow power supply for illumination of the lamp.