A light fixture, or luminaire, is an electrical device used to hold and protect a lamp. All light fixtures include the fixture body and light socket. The light socket holds the lamp into position and allows for convenient replacement.
Fixtures require an electrical connection to supply power to the lamp. This can be accomplished with a simple plug and cord, or by direct AC line connection for permanent installations. The socket includes all the necessary components needed to securely hold and provide power to the lamp. This includes the terminal requirements specified by the lamp type.
Light fixtures can be designed to house just about any lamp type and lamp size, provided the fixture can support the necessary voltage and mounting requirements. Furthermore, enclosed and gasketed fixtures are available to protect the lamp from outdoor or harsh conditions.