The filament in the glass bulb is electrified and heated, so that the filament generates thermal radiation and emits light. Lamp holder is the electrical and mechanical connection part of incandescent lamp, which is mainly divided into screw lamp holder, focusing lamp holder and special lamp holder according to form and use.
Commonly used in basic lighting and decorative lighting of residential buildings, it has the advantages of convenient installation, immediate start-up and low cost.
Its working voltage range is very wide, from the battery voltage of several volts to the mains voltage, which is low in price and does not need additional circuits.
Its main applications are home lighting and places where intensive low-voltage lamps are needed, such as flashlights and console lighting.
Only 10% of the input energy is converted into visible light energy, and the typical life span ranges from tens of hours to thousands of hours.
2. The invention of tungsten halogen lamp 1959 brought the technology of incandescent lamp to a new height and prolonged its life. Compared with halogen-free incandescent lamps with the same rated power, tungsten halogen lamps are much smaller in size and allow to be filled with heavier high-pressure gas (more expensive). These changes can prolong its life or improve its light efficiency.
Similarly, the tungsten halogen lamp can also be directly connected to the power supply without the control circuit.
The life of ordinary incandescent lamp is 1000 hours, while the life of halogen tungsten lamp is half of it, and the luminous efficiency is improved by 30%.
Tungsten halogen lamps are widely used in motor vehicle lighting, projection systems, special spotlights, low-cost floodlighting, stage and studio lighting and other occasions that need to surpass halogen-free incandescent lamps in compactness, convenience and good performance.
3. Fluorescent lamp Fluorescent lamp appeared in the 1940s. It uses the principle of gas discharge to generate light energy.
Because the light emitted is mainly ultraviolet rays and less infrared radiation, the luminous efficiency is higher than that of incandescent lamps. This lamp will save 75% energy and prolong its life by 8~ 10 times.
Our commonly used fluorescent lamps mainly include fluorescent lamps, high lumen single-ended fluorescent lamps and energy-saving lamps (compact fluorescent lamps), which are widely used so far and dominate commercial and industrial lighting.
Commonly used in offices, shopping malls, residential buildings and other general public buildings, there are a variety of optional light colors, which can not only achieve high illumination, but also give consideration to economy.
It also gives off many beautiful and colorful lights.
This is determined by the chemical properties of phosphors, such as magnesium tungstate coated with blue-white light and cadmium borate coated with red light.
Through the innovation of design, the development of fluorescent powder and the application of electronic control circuit, the performance of fluorescent lamp has been continuously improved.
4. Intensity gas discharge lamp (HID) This kind of lamp is a high-pressure discharge lamp, which is characterized by a short high-brightness arc discharge tube. Usually, there is a certain shape of glass or a timely shell outside the discharge tube, which is transparent or frosted, or coated with a layer of fluorescent powder to increase red radiation.
It is divided into high-pressure mercury lamp (HPMV), high-pressure sodium lamp (HPS) and metal halide lamp (M-H). National Owner Decoration Exchange Group 573032 185.