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2. Recessed light - Wikipedia

   en.wikipedia.org/wiki/Recessed_light

   Different types of recessed lighting in a warehouse "Pot light" or "canister light" implies the hole is circular and the lighting fixture is cylindrical, like a pot or canister. There are three parts to a recessed lighting fixture: housing, trim and bulb. The trim is the visible portion of the light.

3. Light fixture - Wikipedia

   en.wikipedia.org/wiki/Light_fixture

   A light fixture (US English), light fitting (UK English), or luminaire is an electrical lighting device containing one or more light sources, such as lamps, and all the accessory components required for its operation to provide illumination to the environment. [1] All light fixtures have a fixture body and one or more lamps.

4. Metal-halide lamp - Wikipedia

   en.wikipedia.org/wiki/Metal-halide_lamp

   Like other gas-discharge lamps such as the very-similar mercury-vapor lamps, metal-halide lamps produce light by ionizing a mixture of gases in an electric arc.In a metal-halide lamp, the compact arc tube contains a mixture of argon or xenon, mercury, and a variety of metal halides, such as sodium iodide and scandium iodide. [7]

5. Halo (optical phenomenon) - Wikipedia

   en.wikipedia.org/wiki/Halo_(optical_phenomenon)

   A halo (from Ancient Greek ἅλως (hálōs) ' threshing floor, disk ') [1] is an optical phenomenon produced by light (typically from the Sun or Moon) interacting with ice crystals suspended in the atmosphere. Halos can have many forms, ranging from colored or white rings to arcs and spots in the sky.

6. Glory (optical phenomenon) - Wikipedia

   en.wikipedia.org/wiki/Glory_(optical_phenomenon)

   Glory around the shadow of a plane. The position of the glory's centre shows that the observer was in front of the wings. A glory is an optical phenomenon, resembling an iconic saint's halo around the shadow of the observer's head, caused by sunlight or (more rarely) moonlight interacting with the tiny water droplets that comprise mist or clouds.

7. Halo: The Master Chief Collection - Wikipedia

   en.wikipedia.org/wiki/Halo:_The_Master_Chief...

   Halo: Nightfall—a series of weekly, episodic digital videos directed by Sergio Mimica-Gezzan and produced by Ridley Scott—launched soon after the collection was released. The series was designed to connect the stories of previous Halo games to the upcoming Halo 5. [3] The Halo 5 beta launched on December 29, 2014, and ran until January 18 ...