There bayonet cap and screw etc., commonly used lamp has E27, E14, E26, etc., which are all screw lampholders, the letter E represents Edison screw threaded sockets or lamp, lamp holder behind the figures represent the external thread integer diameter, in mm.
Therefore E27 represents the outer diameter of 27mm screw caps, E14 represents the outer diameter of 14mm screw caps, LED lamp power and lamp size does not matter, the same power LED lamp can be used both E27 lamp cap, may be employed E14 lamp base, wherein the E27 is the most commonly used lamp.
There lamp B22, B22 lamp is a lamp cap, the lamp cap is connected to the power line means end, with an interface for mounting the lamp, the lamp is fixed to the lamp holder, the lamp power supply connected to the lamp member.
The main use of electric light source lamp holder naming method. Related symbols meaning: B bayonet cap, behind the B numbers indicate the diameter of the housing, such as: B22D / 25 × 26-- two finger contacts with a diameter of about 22mm bayonet cap; total length of about 25mm, skirt diameter of about 26mm.
