What are the various models of LED lamp heads?

In terms of installation methods, they are divided into bayonet, screw and other methods; in terms of materials, they are divided into bakelite, plastic, metal, ceramic and other materials. Commonly used lamp holders such as E27 are the most common screws for energy-saving lamps. Lamp holders, and lamp holders that match fluorescent lamps are usually called T8 lamp holders or T5 lamp holders, etc. In addition, depending on the use environment, some lamp holders have a protection level as high as IP68. When purchasing, please make the corresponding IP protection level lamp holder according to your needs. (Waterproof, etc.), usually the lamp holder will use IEC (International Electrotechnical Commission standards) safety certification, lamp holder classification: \x0d\\x0d\ E14, E27, E12, E26, etc. E usually starts with: screw lamp holder\ x0d \ \ mm "MM"). \x0d\\x0d\　MR16, MR11 starting with MR are direct plug-in small spotlights for local lighting. This type of lamp holder is commonly used. Usually, small spotlights have two pins for easy installation. \x0d\\x0d\　MR16, GU10 have different lamp holders, PAR30 and 38 have different diameters. They are all universal standards and names. They are both lamp cups and spotlights. Each is suitable for different weather. Lamp holder for lanterns. \x0d\\x0d\　MR16 in the lighting industry refers to a lamp with a multi-sided reflector with a maximum outer diameter of 2 inches. MP11 is a lamp slightly smaller than MR16. \x0d\　MRMR: Multiface Reflect, multi-faceted reflection (light cup), the number behind indicates the diameter of the lamp cup (unit is 1/8 inch), the diameter of MR16 = 16×1/8=2 inches≈50mm\x0d\\x0d\ PAR lights generally include PAR30, PAR36, PAR46, PAR56. They can be long or short in size. They are also called downlights. They emit light beams and are used to illuminate the stage, dynamic color changes, etc. They are common lamps on the stage because they consume a lot of power and are baked. It feels like it is now being gradually replaced by LED PAR lights\x0d\ AR111/AR70 are aluminum cold reflective halogen spotlights\x0d\\x0d\ E27 and E14 refer to the size of ordinary screw lamp heads, and E27 is the incandescent we usually use As for the lamp head, E14 is one size smaller than it, and E40 is larger than E27. \x0d\\x0d\ G12 is a single-ended tubular metal halide bulb.