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In our daily life, we often come into contact with the concept of incandescent lamp, fluorescent lamp, energy saving lamp and LED lamp. But do you really understand the difference between these lights? Do you know how to work? Do you know their strengths and weaknesses? Let us spread the knowledge of these lamps.

A), incandescent lamp is also called electric lighting, since 1879, Edison made the carbon fiber (i.e. since the carbon filament) incandescent lamp, the people of filament material, the structure of the filament and the filling gas continuous improvement, incandescent lamp luminous efficiency is also a corresponding increase. In 1959, the United States on the basis of the development of incandescent lamps and the size of the small and halogen lamp. The development trend of incandescent lamp is the development of energy-saving lamp

B), the working principle: current through the filament (tungsten, the melting point of more than 3000 degrees Celsius degrees) generates heat, a helical filament will continue to accumulate the heat, the filament temperature of 2000 Celsius degrees above filament when in a state of incandescent, like burning red iron can shine like a light. The higher the temperature of the filament, the brighter the light is emitted. It is called incandescent lamp. When incandescent light bulbs, a large amount of electric energy is converted into heat energy, and only a very few can be converted into useful light energy.

C), advantages: power is small, the power consumption is not high, but also very cheap; with directional, scattering, diffuse and other forms; very good lighting effects; general, color variety; start a good summary: incandescent lamps in China compared with the less, in the next few years, incandescent lighting become history. In the United States, Australia and other countries, the use of incandescent light. Of course, the light of incandescent lamp or in people's hearts

Fluorescent lamp belongs to the gas discharge light source, which is divided into the traditional fluorescent lamp and the fluorescent lamp.

Working principle: traditional type fluorescent lamp is low pressure mercury lamp, the low pressure mercury vapor release ultraviolet in electricity, so as to ensure that the fluorescent powder to emit visible light emitting principle, so it belongs to low pressure arc discharge light source. The fluorescent lamp, which has no pole lamp, cancels the filament and the electrode of the traditional fluorescent lamp, and uses the principle of electromagnetic coupling, so that the mercury atom is excited from the initial state to the excited state.

Advantages: high luminous efficiency; long service life; soft light, light and pleasant; there is a certain decorative effect

Faults: light decay; fluorescent display color than incandescent lamps; light flickering, to eyesight has certain influence; the production process and the use of discarded after mercury pollution summary: with the people's growing concern for health and environmental protection, fluorescent lamps bring harm is more and more people criticized. In the current society, which is the mainstream of health and environmental protection, mercury pollution, as well as the impact of such a serious thing, how can it be long?

Summary: it is clear that as long as the cost of LED lights with the continuous improvement of the LED technology and the LED market has a unified standard, energy-saving lamps and incandescent lamps will be replaced by LED lamps.