The difference between lamp head and lamp holder

The lamp head refers to the metal/plastic interface part at the end of the bulb, which matches the lamp holder to achieve power supply, such as the threaded head (E26/E27) or plug head (GU5.3/GU10) of the LED bulb, which is a component of the bulb and cannot be used separately.

The lamp holder is the basic component of a fixed lighting fixture, directly connected to the power line, responsible for power supply and physical support, such as E26, E27 screw socket or GU10 bayonet socket, which need to be embedded in the ceiling or wall for installation.

The key difference lies in the fact that the lamp holder is a 'socket', while the lamp holder is a 'plug'. The lamp holder is fixed for a long time, and the lamp holder is replaced with the light bulb.