A light fixture or luminaire is a technical and professional term for the electrical fixtures used to hold a lamp—a light bulb—the light source.

Wikimedia Commons has media related to Lighting fixtures.

Note: The vernacular word "lamp" is often used casually when meaning a light fixture—luminaire: including a table lamp, hanging lamp, porch lamp, desk lamp, wall lamp, floor lamp, and numerous others; and in their components’ names such as lamp shade, lamp cord, and lamp switch.
Therefore some articles in this category use 'lamp' in their title, but are about light fixtures.