LED lamp holder is a kind of lamp holder that is widely used now. It has good lighting effect, high energy-saving performance, and is the most cost-effective existence. And we also know that there are still some different types of LED lamp holders, let's take a look at the common LED lamp holders together.

Common LED lamp holders are E27 (screw mouth), B22 (bayonet), E14 (small head), E40 (large in fact, abbreviated as B22 lamp holders. In general, E27 is the big screw lamp holder we usually call, and E14 is For the small screw lamp holder, you can make a note about it like this.

　　 E27 and E14 are both spiral lamp holders or lamp holder codes. The letter E indicates the spiral lamp holder or lamp holder with Edison thread of the car lamp holder, and the number after "E" indicates the integer value of the outer diameter of the lamp holder thread, and the unit is mm. The outer diameter scales of E27 and E14 lamp caps are taken as integers 27mm and 14mm, respectively. The length of the E27 lamp holder is about 27mm, and the length of the E14 lamp holder ranges from 20 to 25mm. For lamps of the same wattage, either E27 lamp holder or E14 lamp holder can be used. Generally, the lamp holder of E14 will be slightly shorter.