Common Lamphouders of LED Bulbs

Published: 06th April 2011
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Nowadays, LED bulbs have turned out to be more and more recognized by the the public. The visual appearance of LED light bulbs looks very much the same (or similar if not the same) as the traditional light bulubs. This article will discuss the commonly seen lampholders of LED bulbs, e.g., E26/E27, B22, MR16, GU10, Par 30 and Par 38 etc.

Light Emitting Diodes, or LEDs, are popular in today's times a number of devices - LEDs can be founded in remote equipments, toys, and machines etc. Also, LEDs are widely used for traffic lights, i.e., traffic signals, message boards etc. However, until recently, LEDs have not become popular in the mainstream lighting market, most likely because LED lamps are still somewhat more pricy than traditional lighting such as incandescent light bulbs and fluorescent tubes.

However, the drawbacks of LED light bulbs would not prevent us to take a look at them. There could be so many topics about LED lamps that we might need lots of articles to talk about. But in this particular one, we will purely targeted the design of LED lamps.

Depending on installation, lamp holders can be commonly divided into bayonet-type and screw-type, etc. Based upon material, lamp holders are made of plastic, metal, ceramics, etc. For example, E27 maybe the most frequently employed screw lampholder for light bulbs. And the typical lampholders for fluorescent and energy-saving tubes are referred to as T10, T8 and T5.

A few lampholders may need up to IP68 protection grading. Generally, lampholder are required to meet IEC (International Electrotechnical Commission standard) security certification.

Lampholder Category:

Usually, the name of a lampholder type is likely to be just like this "letter(s) + number(s)". A letter at the beginning often suggests 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 an "E" followed by a number are all Edison screw lamp holders. Apparently, E symbolizes Edison, the name of the great man who produced incandescent bulb. E27 is commonly used in household lighting - incandescent light bulbs. E14 has a smaller size compared to that of E27, while the size of E40 is larger than that of E27.

B22, that has a 2-pin screw, is another frequently used lamp holder type for incandescent bulbs.

GU lamps. GU lamp (e.g., GU10) is a daily use bayonet-type. GU: G, means the lamp holder type; U means the tha is an U-shaped lamp; the number following "GU" signifies the distance between the two feet of the lamp base (size: mm). For example, GU10 implies, the distance between the two feet of the lamp base is 10mm.

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

PAR lamps are typically PAR20 PAR30 PAR36 PAR46 PAR56. The size may be long or short, large or small. Conventional par lamps are also recognized as down lights. They are regularly used to light up the stages, utilizing dynamic-changing light, they are regular lighting fixtures on the stages. However, because of the high power consumption, Par lamps are now progressively being swapped out by LED Par lamps. The the higher the value of the number that follows "Par", the size of the lamp is larger. For example., PAR38 has a larger size than that of PAR30.

The author would like to thank you for reading this article about the lamp holder types of popular LED bulbs. The original article with demonstrating pictures is also available to read online, you may go and visit the following website:

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