An Edison Lamp Holder is a screw-type lamp socket designed to accept medium screw base lamps for providing electrical connection and mechanical support.
The Edison Lamp Holder refers to a threaded lamp socket design that accommodates lamps with a medium screw base, commonly identified by its standardized helical metal shell and center contact. Within commercial and industrial environments, Edison lamp holders are widely used in luminaires, task lighting assemblies, temporary lighting systems, and specialized lighting equipment where standardized lamp compatibility is required.
The design allows the lamp to be mechanically secured while simultaneously establishing an electrical connection through the threaded shell and center contact. This dual-purpose interface contributes to consistent electrical performance and ease of lamp replacement in controlled environments. In professional lighting applications, Edison lamp holders are often incorporated into fixtures used for staging, architectural lighting, inspection lighting, and equipment testing areas.
From an electrical perspective, Edison lamp holders are typically designed for single-phase alternating current systems and are rated for specific voltage and current limits depending on construction materials and intended use. Variations may include phenolic, porcelain, or thermoplastic housings, each selected based on temperature tolerance, durability requirements, and environmental exposure considerations common in commercial and industrial settings.
Because the Edison lamp holder is a non-locking interface, it is generally used in applications where lamps remain stationary once installed and where vibration or movement is minimal. Its widespread standardization allows lighting manufacturers and system designers to specify compatible lamps without requiring proprietary socket designs, simplifying procurement and equipment interoperability across facilities.
Also known as an Edison socket.
Commonly referred to as a medium base lamp holder.
Edison lamp holders are commonly evaluated and governed under guidelines established by UL and NEC, which address electrical safety, material performance, and allowable operating conditions for lighting components used in commercial and industrial electrical systems.
The Edison lamp holder traces its origins to the early development of electric lighting in the late 19th century. Named after Thomas Edison, the threaded socket design was created to provide a reliable, repeatable method for securing incandescent lamps while maintaining electrical continuity. Its simplicity and effectiveness led to rapid adoption and eventual standardization, allowing it to remain in widespread use across evolving lighting technologies, including incandescent, halogen, and certain LED lamp formats.