An Illuminated Electrical Transformer/Power Supply assembly (143) utilizing an Illuminating module assembly (201B) comprising electrical light source (106), Controlling means (104) and remote electrical power source (103), contained within or upon electrical transformer or power supply housing. The illuminated electrical transformer or power supply is designed for the purpose of illumination while attaching the electrical transformer or power source to an electrical receptacle. The electrical light source (106) is positioned to illuminate an electrical receptacle to provide a lighted and clear view, enabling user to safely, accurately and conveniently connect the electrical transformer or power supply to the electrical receptacle.