HID lamps are often inserted in porcelain lamp socket which offer electrical connections to the lamp and help it inside the flood light fixtures, the usage of porcelain lamp holder allows lights to become safely and conveniently replaced (re-lamp)in the end of life, or to transform power, color, lighting technology and so on,
There are plenty of different standards for these lamp holders, created by many standards bodies, some miniature lights have wire leads suitable for direct connection to wires, some reflector equipment and lighting have screw terminals for wire connections.
Generally speaking, the incandescent lamp and metal halide bulb are direct heat radiation lamps, a 220-volt incandescent lamps common maximum power of 300 watts, metal halide lamp can up to 2000 watts, the light bulb is at very high temperatures! So the lamp holders must be high temperature resistant!
HID (High-Intensity Discharge) lamps are a type of electrical gas-discharge lamp that produces light by means of an electric arc between tungsten electrodes housed inside a translucent or transparent fused quartz or fused alumina arc tube. They’re used in various settings, including outdoor lighting and in large indoor areas like warehouses or gymnasiums due to their high light output.
Porcelain lamp holder sockets are commonly used with these lamps due to their high resistance to heat, excellent electrical insulation properties, and durability. Here’s more information on E27 and E40 socket types:
- E27 Porcelain Lamp Holder: This is a standard medium-size screw-type socket used globally except in North America where the similar E26 is more common. It’s called E27 because the “E” stands for “Edison” (the inventor of the light bulb), and “27” represents the diameter of the screw base in millimeters.
- E40 Porcelain Lamp Holder: This is a larger screw-type socket, also known as a “Goliath Edison Screw” or “Mogul Edison Screw”. The “40” represents the diameter of the screw base in millimeters. E40 sockets are often used with larger, high-intensity discharge lamps.
These porcelain lamp holder sockets are designed to handle the higher heat and electrical loads that come with HID lamps. When using these types of fixtures, it’s crucial to use the right type of lamp holder to prevent overheating and potential electrical issues.
Porcelain lamp holder E27,E14, E12, E26 are very popular in our daily life, “E” at the beginning is usually: screw socket, GU10 Gu at the beginning for our daily use of the bayonet. GU:G said lamp type is a plug-in, u said lamp presents a U shape, the numbers behind said lamp foot hole center distance (mm, mm).
Porcelain E40 lamp holder can resist high temperatures, it’s cheap price and long-life span, so bulb holder is very popular for industrial lighting, e.g.: Warehouse, Factory, Square, Buildings, Hospitals, Gym, Factories, Gas Station, Road Porcelain light socket is available for E40 Edison screw bulbs.
The metal halide bulbs power can reach to 1500 watts, if use plastic or Bakelite lamp holder, the bulb holder will burn out in five minutes, only porcelain lamp socket bears the temperature, generally higher than 2800 digress.
But commonly used Bakelite lamp holders in the bulbs power more than 150 Watt, it’s often burned out! The ceramic lamp holder is not easy to transport, it’s fragile, easy to break, it’s heavy, the cost of transportation is high.
Bakelite lamp holder is not environmentally friendly, Unrecyclable. High temperature resistant 180-250 and expensive cost, High temperature porcelain lamp holder, ceramic lamp holder temperature higher than 3000 degrees, Bakelite lamp holder temperature of 180 degrees, 10 minutes to burn out. So need to choose a porcelain lamp holder.