Popular Lampholders of LED Bulbs

Mar 22nd, 2012 | Posted by | Filed under LED Light

In the present day, have become more and more recognized by the customers. The visual appeal of LED light bulbs seems very much the same (or similar if not the same) as the conventional light bulubs. This article will take a look at the typically seen of , e.g., E26/E27, B22, MR16, GU10, Par 30 and Par 38 etc.

Light Emitting Diodes, or LEDs, are widely used at this moment in various devices – LEDs could be founded in remote controls, toys, and machines etc. Also, LEDs are commonly used for traffic lights, i.e., traffic signals, message boards etc. However, so far, LEDs have not become popular in the mainstream lighting markets, probably because LED lights are still very much more costly than conventional lighting such as incandescent light bulbs and fluorescent tubes.

However, the negatives of LED light bulbs would not prevent us to discuss them. There could be so many topics about LED lamps that we probably will need a lot of articles to discuss. But in this specific one, we will purely work on the design of LED lamps.

According to installation, lamp holders can be usually split into bayonet-type and screw-type, etc. According to material, lamp holders are made of plastic, metal, ceramics, etc. For example, E27 maybe the most regularly employed screw lampholder for light bulbs. And the common lampholders for fluorescent and energy-saving tubes are referred to as T10, T8 and T5.
Some lampholders may call for up to IP68 protection grading. Normally, lampholder are requested to meet IEC (International Electrotechnical Commission standard) security certification.

Lampholder Category:
Commonly, the name of a lampholder type is likely to be just like this “letter(s) + number(s)”. A letter at the beginning usually signifies 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. Certainly, E represents Edison, the name of the great man who invented incandescent bulb. E27 is commonly used in domestic lighting – incandescent light bulbs. E14 has a smaller size than 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 indicates the tha is an U-shaped lamp; the number following “GU” suggests the distance between the two feet of the lamp base (size: mm). For example, GU10 suggests, the distance between the two feet of the lamp base is 10mm.

MR16, MR11 lights. Starting with “MR”, followed by a number, this type of lamps are usually used for spot lighting for a small area. The lamps usually have two small pins. MR: Multiface Reflect, multi-faceted reflector (light cup), followed by a number that suggests 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 similar calculation for MR11.

PAR lamps are typically PAR20 PAR30 PAR36 PAR46 PAR56. The volume may be long or short, large or small. Conventional par lamps are also recognized as down lights. They are frequently used to illuminate the stages, by working with dynamic-changing light, they are common lighting fixtures on the stages. However, because of the high power consumption, Par lamps are now steadily 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.