A multifaceted reflector (usually abbreviated MR) light bulb is a reflector housing format for halogen in addition to some LED and reduce energy consumption fluorescent lamps. MR lamps had been originally designed for use in slide projectors, but see use in residential lighting and retail lighting as properly. They are suited to functions that require directional lighting akin to track lighting, recessed ceiling lights, desk lamps, pendant fixtures, panorama lighting, retail display lighting, reduce energy consumption and bicycle headlights. MR lamps are designated by symbols corresponding to MR16 the place the diameter is represented by numerals indicating units of eighths of an inch. Widespread sizes for normal lighting are MR11 (11⁄8 inches, 35 mm) and MR16 (16⁄8 inches, fifty one mm), with MR8 (8⁄8 inch, 25 mm) and MR20 (20⁄8 inches, reduce energy consumption 64 mm) used in specialty applications. Many run on low voltage slightly than mains voltage alternating current so require a power provide. 3,314,331 for reduce energy consumption a miniature reflector lamp in 1967. The innovation was utilizing the lamp rim, slightly than the bottom, because the reference plane for focusing.

This allowed extra versatile electrical mounting arrangements and more exact focusing. Most MR lamps consist of a halogen capsule (or, bulb) integrated with a pressed glass reflector with a base conforming to bi-pin GU5.3 customary. The reflector controls the route and spread of light forged from the lamp. Some lamps use an aluminum coating as a reflector. Others use selective dichroic coating that reflects seen light and permits infrared radiation to pass by means of. This kind reduces heating of illuminated objects since much less infrared radiation is current in the light beam. Nonetheless, dichroic lamps must solely be used in appropriate fixtures that can dissipate the heat. Dichroic lamps must not be fitted to recessed or enclosed luminaires with the IEC 60598 No Cool Beam image. The brightness of MR lamps may be adjusted when used with acceptable light fixtures and dimmers. However, the coloration temperature adjustments considerably when the lamp is dimmed, shifting dramatically to the hotter end of the spectrum.

Like all halogen lamps, MR lamps produce significant heat and care have to be taken to keep away from contact with skin or proximity to flammable materials when the lamp is on or has been on not too long ago. Halogen lamps (18 lm/W typical) are extra energy efficient than regular incandescent lamps (15 lm/W typical) however still fall far behind different extra-latest types reminiscent of fluorescent lamps (80-one hundred lm/W), gasoline discharge lamps (100-200 lm/W relying on sorts), and LEDs (125-one hundred fifty lm/W typical in brilliant white depending on model). With both sorts of incandescent bulbs, helpful life can be considerably shortened if their filaments expertise mechanical shock or vibration. Using an digital transformer with a gentle begin feature can considerably extend life, because it reduces the characteristically high inrush present that happens initially when the lamp is chilly. Dimming additionally extends life considerably. MR lamps, like all quartz-halogen lamps, produce some undesirable ultraviolet light. Usually, this have to be filtered out.

Also, the quartz capsules of the lamps may rupture or explode upon failure of the lamps. For these two causes, some MR lamps include a cover glass that serves as an integrated ultraviolet filter and reduce energy consumption explosion shield. MR16 lamps missing this cover require the usage of a fixture that incorporates an exterior piece of glass particularly designed to supply each ultraviolet and bodily protection. MR lamps are available in 10-seventy five watt power scores (150-800 lumens). MR lamps most often operate at 12 volts, although they're additionally obtainable in other voltages. These lamps use a bi-pin connector for EcoLight power: 12-volt MR11 bulbs usually use a GU4 base, and 12-volt MR16 bulbs often use a GU5.Three base. The common 12-volt MR16 lamps, EcoLight reviews subsequently, require a ferromagnetic or electronic transformer-sometimes misnamed as a ballast-to convert the 120- or 230-volt mains voltage to the extra-low voltage required by the lamp. Sure MR lamps can operate immediately on the mains voltage. These lamps typically use a GU10 turn-and-lock base, so that they cannot be by chance interchanged with low-voltage lamps.

GU10 is distinguished from the lower-voltage MR lamps by the U-formed ceramic base mount with a ten mm (pin middle-to-center distance) 2-pin bayonet mount. MR16 lamps with an built-in transformer are also out there. These lamps have screw bases to suit standard medium-base Edison sockets. MR lamps are generally accessible in vary of color reduce energy consumption temperatures, from about 2700 K to 7000 Ok, to satisfy varied functions. Retrofit lamps that generate gentle by a different principle however uses the MR type-issue can be found. For example, EcoLight solutions LED-primarily based MR16 lamps appear just like halogen lamps and might be utilized in most fixtures designed for MR lamps. The same is true of MR11-compatible LED lamps. Fixtures designed for halogen MR16 or MR11 lamps that use digital transformers may must be retrofitted with LED-appropriate transformers. There's a wide variety of designs, various considerably with regard to beam width, EcoLight light color, effectivity and luminous reduce energy consumption.

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Pub: 05 Sep 2025 08:52 UTC

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