Sunday, 27 March 2011

Various standard LED lampholders: E27, MR16, GU10, PAR

According to installation, lampholders are usually divided in to bayonet-type & screw, etc. According to material, bakelite, lamp holders are made of plastic, metal, ceramics, etc. For example, E27 possibly the most often used screw lampholder for light bulbs. & the lampholders for fluorescent & energy-saving tubes are known as T8 & T5.

Some lampholders may need up to be IP68 protection grading. Most of the lampholder are necessary to meet IEC (International Electrotechnical Commission standard) security certification.

Lampholder Classification:

Typically, the name of a lampholder type is likely to be like this"letter(s) + number(s)". A letter at the beginning often indicates the shape of the bulb, i.e. E for Edison, T for tubular, R for reflector.

E12, E14, E26, E27, E40 and other names with "E" at the begining are all Edison screw lampholders. Obviously, E represents Edison, the name of the great man who invented incandescent bulb. E27 is often used in residential lighting incandescent light bulbs. E14 has a smaller size than E27, while E40 is larger than E27.

B22, with 2-pin screw, is another often used lampholder type for incandescent light bulbs.

GU lamps (e.g., GU10) is a daily use bayonet-type. GU: G type lamp holder, known as plug-in, U said that U-shaped lamp part of the show, behind the numbers that light foot hole center distance (in “mm”) .

MR16, MR11 lamps. Begining with “MR”, followed by a number, this type of lamps are usually used as spot lighting for a small area. The bulbs usually have two small pins. MR: Multiface Reflect, multi-faceted reflector (light cup), followed by numbers indicates the lamp cup diameter(unit is 1 / 8 inch). E.g., MR16′s diameter = 16 × 1/8 = 2 inches or = 50mm. The same calculation for MR11.

PAR lamps are generally PAR20 PAR30 PAR36 PAR46 PAR56, volume may be long or short, known as down light. Par lamps are used to illuminate the stage, with dynamic-changing light colour, they are common lighting fixtures found on the stage. However, because of the high power consumption, Par lamps are now gradually being replaced by LED PAR lamps. Dimension is increasing as the number following “PAR” increases, i.e., PAR38 has a larger size than that of PAR30′s.

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