What does "luminaire" refer to in the context of Article 410?

In the context of Article 410, "luminaire" refers specifically to a complete lighting unit that includes not only the light source itself—such as a bulb— but also the parts that distribute the light. This encompasses all components necessary for the fixture to function, including reflectors, lenses, and any other integral apparatus that manages how the light is emitted and directed.

Understanding this term is crucial for proper installation and compliance with the National Electrical Code, as it defines how lighting systems are to be assembled and their safety requirements. The luminaire ensures that light is effectively distributed in a space, complying with design needs and safety standards dictated by the NEC.

The other options describe components or systems that may be related to lighting but do not provide the complete definition of "luminaire" as understood in Article 410. For example, a component that produces electrical energy refers to sources such as generators or batteries, which are not distinct to lighting fixtures. A device used for controlling lighting intensity might refer to dimmers or controls, which manage the output but do not constitute the luminaire itself. Lastly, a support structure for electrical wiring doesn’t encompass the function of light distribution inherent to luminaires, thus missing the key aspects of their definition.