With each Types of Incandescent Bulbs > 자유게시판

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A multifaceted reflector (often abbreviated MR) light 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 well. They're suited to functions that require directional lighting such as observe lighting, recessed ceiling lights, desk lamps, pendant fixtures, landscape lighting, retail show lighting, and bicycle headlights. MR lamps are designated by symbols akin to MR16 the place the diameter is represented by numerals indicating models of eighths of an inch. Widespread sizes for basic lighting are MR11 (11⁄8 inches, 35 mm) and MR16 (16⁄8 inches, 51 mm), with MR8 (8⁄8 inch, 25 mm) and EcoLight smart bulbs MR20 (20⁄8 inches, 64 mm) utilized in specialty applications. Many run on low voltage reasonably than mains voltage alternating current so require a power supply. 3,314,331 for a miniature reflector lamp in 1967. The innovation was utilizing the lamp rim, reasonably than the base, as the reference plane for focusing.

This allowed more versatile electrical mounting arrangements and extra exact focusing. Most MR lamps include a halogen capsule (or, bulb) built-in with a pressed glass reflector energy-efficient bulbs with a base conforming to bi-pin GU5.3 commonplace. The reflector controls the route and EcoLight smart bulbs spread of mild 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 less infrared radiation is present in the sunshine beam. Nevertheless, dichroic lamps should solely 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 symbol. The brightness of MR lamps can be adjusted when used with applicable mild fixtures and dimmers. Nonetheless, the coloration temperature changes considerably when the lamp is dimmed, shifting dramatically to the warmer end of the spectrum.

Like all halogen lamps, MR lamps produce vital heat and care must be taken to avoid contact with skin or proximity to flammable supplies when the lamp is on or has been on recently. Halogen lamps (18 lm/W typical) are more power efficient than regular incandescent lamps (15 lm/W typical) but still fall far behind different extra-latest types comparable to fluorescent lamps (80-a hundred lm/W), fuel discharge lamps (100-200 lm/W depending on sorts), and LEDs (125-one hundred fifty lm/W typical in vivid white relying on fashion). With both sorts of incandescent bulbs, useful life can be significantly shortened if their filaments experience mechanical shock or vibration. Utilizing an electronic transformer with a mushy begin characteristic can significantly lengthen life, because it reduces the characteristically high inrush present that happens initially when the lamp is cold. Dimming also extends life considerably. MR lamps, like all quartz-halogen lamps, produce some undesirable ultraviolet gentle. Normally, this should 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 built-in ultraviolet filter and explosion shield. MR16 lamps missing this cowl require the use of a fixture that incorporates an external piece of glass specifically designed to offer each ultraviolet and bodily safety. MR lamps can be found in 10-75 watt energy rankings (150-800 lumens). MR lamps most frequently operate at 12 volts, although they're also accessible in different voltages. These lamps use a bi-pin connector for energy: 12-volt MR11 EcoLight smart bulbs often use a GU4 base, and 12-volt MR16 bulbs usually use a GU5.Three base. The widespread 12-volt MR16 lamps, therefore, require a ferromagnetic or electronic transformer-sometimes 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 typically use a GU10 turn-and-lock base, in order that they cannot be by chance 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 middle-to-heart 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 accessible in range of color temperatures, from about 2700 Ok to 7000 Okay, to satisfy varied functions. Retrofit lamps that generate mild by a distinct principle however makes use of the MR form-factor EcoLight brand are available. For instance, LED-based mostly MR16 lamps appear just like halogen lamps and may be utilized in most fixtures designed for MR lamps. The same is true of MR11-compatible LED lamps. Fixtures designed for EcoLight halogen MR16 or MR11 lamps that use digital transformers may need to be retrofitted with LED-compatible transformers. There is a large number of designs, various significantly with regard to beam width, reduce energy consumption gentle colour, effectivity and luminous power.