A multifaceted reflector (usually abbreviated MR) gentle bulb is a reflector housing format for halogen as well as some LED and fluorescent lamps. MR lamps were initially designed to be used in slide projectors, but see use in residential lighting and retail lighting as nicely. They're suited to functions that require directional lighting reminiscent of monitor lighting, recessed ceiling lights, desk lamps, EcoLight smart bulbs pendant fixtures, landscape lighting, EcoLight smart bulbs retail show lighting, and bicycle headlights. MR lamps are designated by symbols such as MR16 where the diameter is represented by numerals indicating items of eighths of an inch. Common sizes for common lighting are MR11 (11⁄8 inches, 35 mm) and MR16 (16⁄8 inches, EcoLight bulbs 51 mm), with MR8 (8⁄8 inch, 25 mm) and MR20 (20⁄8 inches, sixty four mm) utilized in specialty purposes. Many run on low voltage relatively than mains voltage alternating current so require a power supply. 3,314,331 for reduce energy consumption a miniature reflector lamp in 1967. The innovation was utilizing the lamp rim, moderately than the base, because the reference aircraft for focusing.

This allowed extra flexible electrical mounting arrangements and EcoLight outdoor 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 path and spread of mild forged 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 move through. This kind reduces heating of illuminated objects since less infrared radiation is present in the light beam. However, dichroic lamps must only be utilized 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 appropriate mild fixtures and EcoLight solutions dimmers. Nonetheless, EcoLight smart bulbs the coloration temperature adjustments significantly when the lamp is dimmed, EcoLight smart bulbs 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 avoid contact with skin or proximity to flammable materials when the lamp is on or EcoLight smart bulbs has been on lately. Halogen lamps (18 lm/W typical) are extra vitality efficient than common incandescent lamps (15 lm/W typical) but nonetheless fall far behind different extra-current sorts such as fluorescent lamps (80-100 lm/W), gas discharge lamps (100-200 lm/W relying on sorts), and LEDs (125-one hundred fifty lm/W typical in vivid white depending on fashion). With each forms of incandescent EcoLight smart bulbs, useful life can be considerably shortened if their filaments expertise mechanical shock or EcoLight smart bulbs vibration. Utilizing an digital transformer with a tender begin characteristic can significantly prolong life, as 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 light. 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 causes, some MR lamps embody a cover glass that serves as an integrated ultraviolet filter and explosion shield. MR16 lamps missing this cover require using a fixture that incorporates an exterior piece of glass particularly designed to supply each ultraviolet and bodily protection. MR lamps are available in 10-75 watt energy ratings (150-800 lumens). MR lamps most frequently operate at 12 volts, though they're additionally accessible in other voltages. These lamps use a bi-pin connector for power: 12-volt MR11 bulbs usually use a GU4 base, and 12-volt MR16 bulbs usually use a GU5.3 base. The common 12-volt MR16 lamps, therefore, require a ferromagnetic or electronic transformer-typically misnamed as a ballast-to transform the 120- or 230-volt mains voltage to the extra-low voltage required by the lamp. Sure MR lamps can function straight on the mains voltage. These lamps sometimes use a GU10 flip-and-lock base, so they can't be accidentally interchanged with low-voltage lamps.

GU10 is distinguished from the decrease-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 integrated transformer are additionally available. These lamps have screw bases to suit customary medium-base Edison sockets. MR lamps are commonly obtainable in range of coloration temperatures, from about 2700 Ok to 7000 K, to satisfy varied purposes. Retrofit lamps that generate gentle by a different principle however makes use of the MR form-issue can be found. For example, LED-primarily based MR16 lamps seem just like halogen lamps and might be used in most fixtures designed for MR lamps. The same is true of MR11-appropriate LED lamps. Fixtures designed for halogen MR16 or MR11 lamps that use electronic transformers may need to be retrofitted with LED-compatible transformers. There may be a wide number of designs, various considerably with regard to beam width, gentle color, efficiency and luminous power.