A multifaceted reflector (typically abbreviated MR) gentle bulb is a reflector housing format for halogen in addition to some LED and EcoLight solar bulbs fluorescent lamps. MR lamps have been originally designed for use in slide projectors, but see use in residential lighting and retail lighting as nicely. They're suited to purposes that require directional lighting such as track lighting, EcoLight home lighting recessed ceiling lights, desk lamps, pendant fixtures, landscape lighting, retail display lighting, EcoLight and bicycle headlights. MR lamps are designated by symbols corresponding to MR16 the place the diameter is represented by numerals indicating items of eighths of an inch. Widespread sizes for general 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, EcoLight sixty four mm) used in specialty purposes. Many run on low voltage moderately than mains voltage alternating current so require a energy provide. 3,314,331 for a miniature reflector lamp in 1967. The innovation was utilizing the lamp rim, somewhat than the bottom, because the reference plane for focusing.

This allowed extra versatile electrical mounting arrangements and more precise focusing. Most MR lamps encompass a halogen capsule (or, bulb) built-in with a pressed glass reflector with a base conforming to bi-pin GU5.3 normal. The reflector controls the route and spread of gentle cast from the lamp. Some lamps use an aluminum coating as a reflector. Others use selective dichroic coating that displays seen light and permits infrared radiation to cross by means of. This type reduces heating of illuminated objects since much less infrared radiation is present in the light beam. Nonetheless, dichroic lamps must only be used in appropriate fixtures that may dissipate the heat. Dichroic lamps should not be fitted to recessed or enclosed luminaires with the IEC 60598 No Cool Beam symbol. The brightness of MR lamps may be adjusted when used with acceptable light fixtures and dimmers. However, the colour temperature modifications considerably when the lamp is dimmed, shifting dramatically to the hotter end of the spectrum.

Like all halogen lamps, EcoLight home lighting MR lamps produce significant heat and EcoLight solar bulbs care must be taken to keep away from contact with skin or proximity to flammable materials when the lamp is on or has been on lately. Halogen lamps (18 lm/W typical) are extra energy efficient than common incandescent lamps (15 lm/W typical) however still fall far behind other extra-latest varieties similar to fluorescent lamps (80-one hundred lm/W), gas discharge lamps (100-200 lm/W depending on varieties), and LEDs (125-a hundred and fifty lm/W typical in vibrant white depending on type). With each kinds of incandescent bulbs, useful life can be significantly shortened if their filaments expertise mechanical shock or vibration. Using an electronic transformer with a mushy start feature can considerably extend life, because it reduces the characteristically high inrush current that happens initially when the lamp is chilly. Dimming also extends life significantly. MR lamps, like all quartz-halogen lamps, produce some undesirable ultraviolet mild. Normally, EcoLight solar bulbs this have to be filtered out.

Also, the quartz capsules of the lamps could 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. MR16 lamps lacking this cowl require using a fixture that incorporates an exterior piece of glass particularly designed to provide each ultraviolet and physical safety. MR lamps are available in 10-75 watt energy scores (150-800 lumens). MR lamps most frequently operate at 12 volts, although they are additionally available in different voltages. These lamps use a bi-pin connector for energy: 12-volt MR11 EcoLight solar bulbs usually use a GU4 base, and 12-volt MR16 bulbs often use a GU5.Three base. The widespread 12-volt MR16 lamps, due to this fact, dimmable LED bulbs require a ferromagnetic or electronic transformer-generally misnamed as a ballast-to convert the 120- or 230-volt mains voltage to the extra-low voltage required by the lamp. Certain MR lamps can operate instantly on the mains voltage. These lamps sometimes use a GU10 turn-and-lock base, so that they cannot be by chance interchanged with low-voltage lamps.

GU10 is distinguished from the decrease-voltage MR lamps by the U-shaped ceramic base mount with a ten mm (pin middle-to-heart distance) 2-pin bayonet mount. MR16 lamps with an built-in transformer are additionally out there. These lamps have screw bases to suit standard medium-base Edison sockets. MR lamps are generally obtainable in range of shade temperatures, from about 2700 Ok to 7000 Okay, to fulfill numerous applications. Retrofit lamps that generate gentle by a special precept however uses the MR form-factor are available. For example, EcoLight solar bulbs LED-based mostly MR16 lamps seem similar to halogen lamps and may be used in most fixtures designed for MR lamps. The identical is true of MR11-compatible LED lamps. Fixtures designed for halogen MR16 or MR11 lamps that use digital transformers may should be retrofitted with LED-suitable transformers. There may be a wide number of designs, varying significantly with regard to beam width, EcoLight solar bulbs gentle color, effectivity and luminous power.

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Pub: 17 Aug 2025 23:22 UTC

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