A multifaceted reflector (typically abbreviated MR) gentle bulb is a reflector housing format for halogen in addition to some LED and fluorescent lamps. MR lamps were originally designed for use in slide projectors, however see use in residential lighting and retail lighting as nicely. They're suited to purposes that require directional EcoLight lighting corresponding to monitor lighting, recessed ceiling lights, desk lamps, pendant fixtures, EcoLight smart bulbs landscape lighting, energy-saving LED bulbs retail show lighting, and EcoLight outdoor bicycle headlights. MR lamps are designated by symbols reminiscent of MR16 the place the diameter is represented by numerals indicating items of eighths of an inch. Common sizes for basic lighting are MR11 (11⁄8 inches, 35 mm) and MR16 (16⁄8 inches, fifty one mm), with MR8 (8⁄8 inch, 25 mm) and EcoLight lighting MR20 (20⁄8 inches, 64 mm) used in specialty applications. Many run on low voltage quite than mains voltage alternating current so require a power supply. 3,314,331 for EcoLight lighting a miniature reflector lamp in 1967. The innovation was utilizing the lamp rim, fairly than the base, because the reference airplane for focusing.

This allowed more versatile electrical mounting preparations and more precise 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.Three standard. The reflector controls the path and unfold of gentle forged from the lamp. Some lamps use an aluminum coating as a reflector. Others use selective dichroic coating that reflects visible light and EcoLight lighting allows infrared radiation to cross by means of. This kind reduces heating of illuminated objects since less infrared radiation is present in the sunshine beam. However, dichroic lamps should only be utilized in compatible fixtures that can dissipate the heat. Dichroic lamps must 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. Nonetheless, the coloration temperature changes significantly when the lamp is dimmed, shifting dramatically to the warmer end of the spectrum.

Like all halogen lamps, EcoLight lighting MR lamps produce significant heat and care should 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 environment friendly than common incandescent lamps (15 lm/W typical) but nonetheless fall far behind different extra-latest sorts equivalent to fluorescent lamps (80-one hundred lm/W), fuel discharge lamps (100-200 lm/W relying on sorts), and LEDs (125-150 lm/W typical in bright white depending on type). With each kinds of incandescent bulbs, useful life can be significantly shortened if their filaments expertise mechanical shock or EcoLight lighting vibration. Utilizing an digital transformer with a comfortable start characteristic can considerably prolong life, as it reduces the characteristically excessive inrush present that occurs initially when the lamp is chilly. Dimming also extends life significantly. 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 might rupture or explode upon failure of the lamps. For these two reasons, some MR lamps embrace 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 exterior piece of glass specifically designed to offer each ultraviolet and bodily safety. MR lamps can be found in 10-seventy five watt energy rankings (150-800 lumens). MR lamps most often function at 12 volts, though they're additionally out there in different voltages. These lamps use a bi-pin connector for power: EcoLight 12-volt MR11 bulbs normally use a GU4 base, and 12-volt MR16 bulbs usually use a GU5.3 base. The frequent 12-volt MR16 lamps, due to this fact, require a ferromagnetic or digital transformer-sometimes misnamed as a ballast-to transform the 120- or 230-volt mains voltage to the additional-low voltage required by the lamp. Sure MR lamps can operate immediately on the mains voltage. These lamps usually use a GU10 turn-and-lock base, so they cannot be accidentally interchanged with low-voltage lamps.

GU10 is distinguished from the lower-voltage MR lamps by the U-shaped ceramic base mount with a 10 mm (pin center-to-middle distance) 2-pin bayonet mount. MR16 lamps with an integrated transformer are also out there. These lamps have screw bases to fit normal medium-base Edison sockets. MR lamps are commonly out there in range of coloration temperatures, from about 2700 Ok to 7000 Okay, EcoLight to satisfy varied functions. Retrofit lamps that generate mild by a unique principle but uses the MR kind-issue are available. For example, LED-based mostly MR16 lamps appear similar to halogen lamps and may be used in most fixtures designed for MR lamps. The same is true of MR11-suitable LED lamps. Fixtures designed for halogen MR16 or MR11 lamps that use digital transformers could must be retrofitted with LED-compatible transformers. There's a large number of designs, varying significantly with regard to beam width, mild colour, effectivity and luminous power.