With Both Forms Of Incandescent Bulbs

Aus Vokipedia
Wechseln zu: Navigation, Suche


A multifaceted reflector (often abbreviated MR) gentle bulb is a reflector housing format for halogen in addition to some LED and fluorescent lamps. MR lamps had been initially designed to be used in slide projectors, EcoLight dimmable but see use in residential lighting and retail lighting as nicely. They're suited to purposes that require directional lighting equivalent to track lighting, recessed ceiling lights, desk lamps, pendant fixtures, panorama lighting, retail display lighting, EcoLight bulbs and bicycle headlights. MR lamps are designated by symbols similar to MR16 the place the diameter is represented by numerals indicating models of eighths of an inch. Frequent sizes for general lighting are MR11 (11⁄8 inches, 35 mm) and MR16 (16⁄8 inches, fifty one mm), with MR8 (8⁄8 inch, 25 mm) and MR20 (20⁄8 inches, 64 mm) utilized in specialty functions. Many run on low voltage somewhat than mains voltage alternating present so require a power provide. 3,314,331 for a miniature reflector lamp in 1967. The innovation was using the lamp rim, relatively than the bottom, as the reference aircraft for focusing.



This allowed extra versatile electrical mounting preparations and more precise focusing. Most MR lamps encompass a halogen capsule (or, bulb) integrated with a pressed glass reflector with a base conforming to bi-pin GU5.3 commonplace. The reflector controls the route and unfold of light solid from the lamp. Some lamps use an aluminum coating as a reflector. Others use selective dichroic coating that reflects seen mild and allows infrared radiation to cross by means of. This type reduces heating of illuminated objects since much less infrared radiation is present in the light beam. Nonetheless, dichroic lamps must solely be utilized in appropriate 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 could be adjusted when used with acceptable mild fixtures and dimmers. Nonetheless, the color temperature changes significantly when the lamp is dimmed, shifting dramatically to the warmer finish of the spectrum.



Like all halogen lamps, MR lamps produce important 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 recently. Halogen lamps (18 lm/W typical) are more vitality environment friendly than regular incandescent lamps (15 lm/W typical) however nonetheless fall far behind different extra-recent sorts comparable to fluorescent lamps (80-a hundred lm/W), fuel discharge lamps (100-200 lm/W depending on varieties), and LEDs (125-a hundred and fifty lm/W typical in bright white relying on model). With each forms of incandescent bulbs, helpful life can be significantly shortened if their filaments expertise mechanical shock or vibration. Using an electronic transformer with a delicate start function can significantly extend life, because it reduces the characteristically excessive inrush current that happens initially when the lamp is cold. Dimming also extends life significantly. MR lamps, like all quartz-halogen lamps, produce some undesirable ultraviolet gentle. Normally, this have to be filtered out.



Additionally, the quartz capsules of the lamps might rupture or explode upon failure of the lamps. For these two causes, some MR lamps include a cowl glass that serves as an built-in ultraviolet filter and explosion shield. MR16 lamps missing this cowl require using a fixture that incorporates an exterior piece of glass particularly designed to supply both ultraviolet and bodily safety. MR lamps can be found in 10-seventy five watt power scores (150-800 lumens). MR lamps most frequently function at 12 volts, although they are additionally accessible 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 usually use a GU5.Three base. The frequent 12-volt MR16 lamps, therefore, require a ferromagnetic or electronic transformer-sometimes 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 operate immediately on the mains voltage. These lamps typically use a GU10 flip-and-lock base, EcoLight so that they cannot be unintentionally interchanged with low-voltage lamps.



GU10 is distinguished from the lower-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 normal medium-base Edison sockets. MR lamps are generally out there in range of coloration temperatures, from about 2700 Okay to 7000 K, EcoLight to fulfill various purposes. Retrofit lamps that generate mild by a distinct precept but makes use of the MR kind-issue are available. For instance, LED-based MR16 lamps seem much like halogen lamps and might be utilized in most fixtures designed for EcoLight smart bulbs MR lamps. The identical is true of MR11-compatible LED lamps. Fixtures designed for halogen MR16 or EcoLight energy MR11 lamps that use digital transformers could must be retrofitted with LED-compatible transformers. There may be a large variety of designs, varying significantly with regard to beam width, gentle color, effectivity and luminous power.

Meine Werkzeuge
Namensräume

Varianten
Aktionen
Navigation
Werkzeuge