Substrate for a light module with metal strip used as shielding, a heat screen and/or an optical reflector

A light module particularly for a motor vehicle, comprising:

• substrate;
• one or more light sources arranged on said substrate;
• set of metal strips arranged on said substrate, said set of metal strips forming at least one power supply zone for said one or more light sources;
• some of said set of metal strips extend at a distance from said at least one power supply zone and/or transversely with respect to said at least one power supply zone in such a way as to form one or more auxiliary zones providing an auxiliary function different to a power supply function, for example a heat screen, reflective surface, aesthetic surface, and/or electrical or magnetic shielding function.