From the installation into bayonet, screw, etc., from the material into bakelite, plastic, metal, ceramics and other materials commonly used lamp, such as E27 is the most common energy-saving lamp Screw lamp holders, and with the fluorescent lamp T8 lamp often referred to as T5 lamp or lamp, etc., in accordance with use of the environment protection level up to some lamp IP68, in accordance with the need for when you buy the appropriate IP protection class Socket (waterproof), usually lamp will use IEC (International Electrotechnical Commission standard) security certification, lamp Category:

E14, E27, E12, E26 and other E is usually the beginning: Edison screw lampholders

GU10 GU such that the beginning of daily use for our bayonet, GU: G type lamp that is a plug-in, U said U shaped lamp part of the show, behind the numbers that light foot hole center distance (unit is mm "MM") .

MR16, MR11 to MR at the beginning of the-line local lighting commonly used small spotlights such holder, usually a small spotlight with two pins and easy installation. 

MR16, GU10 lamp is our different, PAR30, 38 are different diameters, are in the world through a standard and it is called, are light cup, spotlights, it is called, each suitable for different days of lantern lamp.

MR16 in the lighting industry refers to the maximum diameter of 2 inches with a multi-faceted reflector lamps, MP11 is smaller than the MR16 lamps.
MRMR: Multiface Reflect, multi-surface reflector (cup), followed by numbers indicate the cup size (unit is 1 / 8 inch), MR16's diameter = 16 ¡Á 1 / 8 = 2 EM ¡Ö 50mm

PAR lamps are generally PAR30 PAR36 PAR46 PAR56, sizes in length, also known as down light, light beam, for lighting the stage, dynamic change color, etc., is a common stage lighting, because the relatively large power consumption, but also grilled feeling, now gradually being replaced by LED PAR lamp
AR111/AR70 is aluminum reflector halogen spotlights cold

E27, E14 refers to the ordinary screw caps of the lamp size, E27 is that we usually use the incandescent lamp, E14 is a smaller size than it than the E27 there is a large E40.

The G12 is a single-ended metal halide bulb tubular.