A multifaceted reflector (often abbreviated MR) gentle bulb is a reflector housing format for halogen as well as some LED and fluorescent lamps. MR lamps have been originally designed for use in slide projectors, however see use in residential lighting and retail lighting as effectively. They're suited to purposes that require directional lighting comparable to observe lighting, recessed ceiling lights, desk lamps, pendant fixtures, panorama lighting, retail show lighting, and bicycle headlights. MR lamps are designated by symbols similar to MR16 where the diameter is represented by numerals indicating items 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), EcoLight products with MR8 (8⁄8 inch, 25 mm) and MR20 (20⁄8 inches, sixty four mm) used in specialty applications. Many run on low voltage quite than mains voltage alternating current so require a energy supply. 3,314,331 for a miniature reflector lamp in 1967. The innovation was using the lamp rim, reasonably than the base, because the reference plane for focusing.

This allowed extra flexible electrical mounting arrangements and more exact focusing. Most MR lamps include a halogen capsule (or, bulb) built-in with a pressed glass reflector with a base conforming to bi-pin GU5.3 standard. The reflector controls the course and spread of gentle solid from the lamp. Some lamps use an aluminum coating as a reflector. Others use selective dichroic coating that displays visible gentle and allows infrared radiation to cross by. This kind reduces heating of illuminated objects since much less infrared radiation is present in the sunshine beam. However, dichroic lamps must only be used in suitable fixtures that may 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 can be adjusted when used with applicable gentle fixtures and EcoLight dimmers. Nonetheless, the coloration temperature adjustments considerably when the lamp is dimmed, shifting dramatically to the warmer finish 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 more power environment friendly than common incandescent lamps (15 lm/W typical) however nonetheless fall far behind different extra-latest varieties comparable to fluorescent lamps (80-a hundred lm/W), energy-efficient bulbs gas discharge lamps (100-200 lm/W depending on types), and LEDs (125-one hundred fifty lm/W typical in vivid white depending on style). With each sorts of incandescent bulbs, useful life might be significantly shortened if their filaments expertise mechanical shock or vibration. Utilizing an electronic transformer with a comfortable begin characteristic can considerably prolong life, because it reduces the characteristically excessive inrush present that happens initially when the lamp is chilly. Dimming also extends life considerably. MR lamps, like all quartz-halogen lamps, produce some undesirable ultraviolet gentle. Normally, 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 embody a cover glass that serves as an built-in ultraviolet filter and explosion shield. MR16 lamps missing this cover require the usage of a fixture that incorporates an external piece of glass specifically designed to provide each ultraviolet and EcoLight solutions physical safety. MR lamps are available in 10-seventy five watt power ratings (150-800 lumens). MR lamps most often operate at 12 volts, though they're also obtainable in different voltages. These lamps use a bi-pin connector for power: 12-volt MR11 bulbs normally use a GU4 base, and 12-volt MR16 bulbs often use a GU5.3 base. The widespread 12-volt MR16 lamps, EcoLight outdoor therefore, require a ferromagnetic or digital transformer-generally misnamed as a ballast-to transform the 120- or 230-volt mains voltage to the extra-low voltage required by the lamp. Certain MR lamps can function straight on the mains voltage. These lamps typically use a GU10 turn-and-lock base, so that they cannot be unintentionally interchanged with low-voltage lamps.

GU10 is distinguished from the decrease-voltage MR lamps by the U-formed ceramic base mount with a 10 mm (pin heart-to-heart distance) 2-pin bayonet mount. MR16 lamps with an built-in transformer are also out there. These lamps have screw bases to fit commonplace medium-base Edison sockets. MR lamps are commonly obtainable in vary of color temperatures, from about 2700 Okay to 7000 Okay, to fulfill numerous functions. Retrofit lamps that generate mild by a special principle however makes use of the MR type-issue are available. For instance, LED-based mostly MR16 lamps seem much like halogen lamps and can be utilized 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-appropriate transformers. There may be a wide number of designs, varying significantly with regard to beam width, EcoLight solutions gentle colour, efficiency and EcoLight home lighting luminous energy.

Edit

Pub: 15 Aug 2025 16:30 UTC

Views: 4