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2. Multifaceted reflector - Wikipedia

   en.wikipedia.org/wiki/Multifaceted_reflector

   MR lamps, like all quartz-halogen lamps, produce some undesirable ultraviolet light. Usually, this must be filtered out. Also, the quartz capsules of the lamps may rupture or explode upon failure of the lamps. For these two reasons, some MR lamps include a cover glass that serves as an integrated ultraviolet filter and explosion shield.

3. Halogen lamp - Wikipedia

   en.wikipedia.org/wiki/Halogen_lamp

   A halogen lamp operating in its fitting with the protecting glass removed A halogen lamp behind a round UV filter. A separate filter is included with some halogen light fixtures to remove UV light. Halogen lamp (105 W) for replacement purposes with an E27 screw base A close-up of a halogen lamp capsule

4. H1 lamp - Wikipedia

   en.wikipedia.org/wiki/H1_Lamp

   Under ECE regulations, H1 lamps are required to emit white or selective yellow light. [1] U.S. regulations require H1 lamps to emit white light. [2] Under both ECE and U.S. specifications, the allowable range of white light is quite large; some H1 lamps have a slight blue or yellow tint to the glass yet still produce light legally acceptable under the requirement for white light.

5. Hydrargyrum medium-arc iodide lamp - Wikipedia

   en.wikipedia.org/wiki/Hydrargyrum_medium-arc...

   An HMI lamp uses mercury vapour mixed with metal halides in a quartz-glass envelope, with two tungsten electrodes of medium arc separation. Unlike traditional lighting units using incandescent light bulbs , HMIs need electrical ballasts , which are separated from the head via a header cable, to limit current and supply the proper voltage.

6. Lightbulb socket - Wikipedia

   en.wikipedia.org/wiki/Lightbulb_socket

   The 1000-watt FEL medium two-pin base halogen lamp allows designers to insert the lamp into the end of the ellipsoidal reflector through a smaller hole than previously possible with conventional incandescent lamps. This improves efficiency compared to the older side-inserted lamp or a double-ended lamp which requires two holes.

7. 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]