The historical source of the lamp should start with torches in ancient times. Secondly, the first revolution of lamps was the "oil lamp", and the evolution of oil lamps was from kerosene lamps, bronze lamps, celadon lamps to lanterns, oil lanterns, and foreign oil lamps. Then came the second revolution "electric light", the evolution of electric light from incandescent lamps and halogen lamps to fluorescent lamps and steam lamps. Finally, LED semiconductor lighting, the transition from LED energy-saving lamps to fluorescent lamps.

The development history of electric lights

1. Incandescent lamp

The tungsten filament used as the filament is the invention of American scientist Corridge, which improves the brightness and service life of the incandescent lamp. The advantages are low cost, relatively wide operating voltage range, and convenience. For example: flashlight, console lighting.

2. Tungsten halogen lamp

On the basis of the incandescent lamp, the life of the lamp is improved by one layer, and the size is small, but the gas that reenters the high pressure is more expensive; its main application range is wider, such as stage lighting effects, motor vehicle lighting, spotlights , etc.

3. Fluorescent lights

The production principle of fluorescent lamps is to use gas discharge to generate light energy. Its advantages are longer service life, 75% energy saving, higher luminous efficiency, and variable light color. It completely replaces incandescent lamps and is widely used in life.

4. Steam lamp

The steam lamp seals the steam of various elements in a glass tube and then emits light with an electric current. Its advantage is that the light efficiency is very high, the service life is twice that of fluorescent lamps and 10 times that of tungsten halogen lamps, and it is more energy-efficient.

5. Induction light

Induction lamps are another form of fluorescent lamps, but require special electronic circuit devices, and are now widely used.

6. The development history of LED semiconductor lighting

After the 21st century, the development process of white light LED is rapid, and its luminous efficiency has improved faster and faster, surpassing incandescent lamps, and declared war on fluorescent lamps. Whether it is material technology, chip size, and shape technology, it has further developed, making it commercialized. The luminous flux of the LED lamp has been increased by several tens of times. This also indicates that the lamps and lanterns of the future will move towards LED.