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 were originally designed to be used in slide projectors, however see use in residential lighting and retail lighting as properly. They're suited to functions that require directional lighting corresponding to observe lighting, recessed ceiling lights, desk lamps, pendant fixtures, EcoLight energy panorama lighting, retail show lighting, EcoLight brand and EcoLight brand bicycle headlights. MR lamps are designated by symbols such as MR16 where the diameter is represented by numerals indicating models of eighths of an inch. Frequent sizes for EcoLight solutions normal lighting are MR11 (11⁄8 inches, 35 mm) and MR16 (16⁄8 inches, 51 mm), EcoLight brand with MR8 (8⁄8 inch, 25 mm) and MR20 (20⁄8 inches, sixty four mm) used in specialty applications. Many run on low voltage rather than mains voltage alternating present so require a energy supply. 3,314,331 for EcoLight solar bulbs a miniature reflector lamp in 1967. The innovation was utilizing the lamp rim, quite than the base, because the reference aircraft for EcoLight brand focusing.

This allowed more versatile electrical mounting preparations and more exact focusing. Most MR lamps include a halogen capsule (or, EcoLight brand bulb) integrated with a pressed glass reflector with a base conforming to bi-pin GU5.Three normal. The reflector controls the route and unfold 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 through. This sort reduces heating of illuminated objects since much less infrared radiation is present in the sunshine beam. Nevertheless, dichroic lamps should solely be used in appropriate fixtures that can dissipate the heat. Dichroic lamps should 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 dimmers. However, the color temperature changes significantly when the lamp is dimmed, shifting dramatically to the hotter finish of the spectrum.

Like all halogen lamps, MR lamps produce significant heat and EcoLight brand care have to be taken to avoid 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 vitality environment friendly than regular incandescent lamps (15 lm/W typical) but still fall far behind different extra-recent varieties equivalent to fluorescent lamps (80-one hundred lm/W), fuel discharge lamps (100-200 lm/W relying on types), and LEDs (125-150 lm/W typical in bright white relying on model). With both sorts of incandescent bulbs, helpful life can be significantly shortened if their filaments expertise mechanical shock or vibration. Utilizing an electronic transformer with a mushy start feature can significantly prolong life, as it reduces the characteristically excessive inrush current 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. Often, this must be filtered out.

Also, the quartz capsules of the lamps might rupture or explode upon failure of the lamps. For these two causes, some MR lamps embody a cowl glass that serves as an built-in ultraviolet filter and explosion shield. MR16 lamps missing this cover require the use of a fixture that incorporates an exterior piece of glass particularly designed to supply both ultraviolet and EcoLight bodily protection. MR lamps can be found in 10-75 watt energy scores (150-800 lumens). MR lamps most frequently function at 12 volts, although they are also accessible in other voltages. These lamps use a bi-pin connector for power: 12-volt MR11 bulbs often use a GU4 base, and 12-volt MR16 bulbs usually use a GU5.Three base. The frequent 12-volt MR16 lamps, due to this fact, 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. Sure MR lamps can operate instantly on the mains voltage. These lamps sometimes use a GU10 flip-and-lock base, in order that they can't be accidentally 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-center distance) 2-pin bayonet mount. MR16 lamps with an built-in transformer are also accessible. These lamps have screw bases to fit standard medium-base Edison sockets. MR lamps are commonly accessible in range of colour temperatures, from about 2700 K to 7000 Okay, to satisfy various applications. Retrofit lamps that generate mild by a distinct precept however uses the MR kind-factor can be found. For instance, LED-primarily based MR16 lamps seem similar to halogen lamps and EcoLight brand will 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 might should be retrofitted with LED-compatible transformers. There's a large number of designs, various considerably with regard to beam width, mild color, effectivity and luminous energy.