A modular bulb holder, also known as a modular lamp holder or socket, is a component used to connect and support a light bulb in an electrical lighting fixture. The term “modular” suggests that it’s part of a system where individual components can be easily replaced or upgraded.
The modular design allows the bulb holder to be part of a system where different modules, such as switches, sockets, and other control devices, can be combined on a single faceplate or within a modular switch panel.