Incandescent lamps were gradually eliminated and withdrew from the historical stage, leaving energy-saving lamps and LED lights in the fight.
What is the difference between energy-saving lamps and LED lamps, and which lamp is better?
First, energy-saving lamps are the progress of incandescent lamps. As we all know, incandescent lamps are an important invention of Edison. This important invention has made mankind bid farewell to darkness and usher in light.
However, incandescent lamps consume too much electricity. It only has less than one-tenth of its energy to become light energy, and the rest is wasted.
So people are trying to replace incandescent lamps with new light sources. Energy-saving lamps came into being.
Because it is cheaper and easier to make, it has been widely used and has a tendency to gradually replace incandescent lamps.
Second, the luminous principle of energy-saving lamps the two poles of energy-saving lamps are ordinary tungsten wires. After the tungsten wire is electrified and heated, it can emit electrons.
A relatively high voltage is added to both sides of the lamp tube to form an electric field. These electrons will be accelerated in the lamp tube to form an electron flow with a certain speed and energy.
The lamp tube is vacuumed and filled with mercury, which is what we call Mercury.
When the lamp tube is electrified and heated, the mercury evaporates from the liquid state to the gaseous state. Mercury atoms forming a free state.
Electrons in the electron flow hit the mercury atom at a certain speed, causing the mercury atom to be excited and become electric ions in the excited state.
Known as a step, Mercury in the excitation State spontaneously falls back to its original state after a short period of time, releasing ultraviolet light, which cannot be used for illumination.
Therefore, we coated some fluorescent substances on the inner wall of the lamp tube. Under the bombardment of ultraviolet light, the fluorescent substances can emit relatively natural light after being excited, which can be used for our lighting.
The more common energy-saving lamps on the market have ordinary lamps and the increasingly mainstream tricolor lamps, which have the advantage of saving electricity compared with incandescent bulbs.
The difference is that the color rendering of ordinary lamps is low, while the three primary colors of lamps show natural sunlight color, and they are better than ordinary lamps in color rendering and light efficiency.
From the above, we can know that Mercury plays an intermediary role in energy-saving lamps, and energy-saving lamps will not emit light without Mercury. There is very little Mercury in each lamp tube.
According to the investigation, a fluorescent lamp with a diameter of 36mm has a mercury content of 25 ~ 45 mg, a small diameter fluorescent lamp with a pipe diameter of 26mm contains 20 mg of Mercury, and a compact fluorescent lamp with a pipe diameter of 10mm contains 10 mg of Mercury.
Mercury is liquid at normal temperature and is a silvery white liquid metal that is easy to flow.
Mercury exists as a gas discharge medium in fluorescent tubes, which not only improves the light efficiency of the lamp, but also enriches the types of light sources. Therefore, the current energy-saving lamp light sources all contain mercury.
Because the boiling point of mercury is very low, it can evaporate at normal temperature. After the discarded fluorescent tube is broken, it immediately emits mercury vapor to the surrounding area, which can instantly make the mercury concentration in the surrounding air reach 10 ~ per cubic meter ~ 20 mg, the high allowable concentration of mercury in air stipulated by the State is 0. 5% per cubic meter. 01 mg. It can also flow with the air.
Once the mercury entering the human body exceeds a certain threshold, it will destroy the human central nervous system and cause great harm to the body. Mercury is difficult to exclude after entering the human body.
The workers in the author's factory have not been exposed to mercury for more than ten years, but now the mercury content in the body is still very high, and Mercury needles are still being injected at any time. Therefore, the author has an instinctive fear of energy-saving lamps.
In fact, there is generally no pollution in the use of mercury-containing lighting lamps. The pollution is mainly caused by the random discard of electric light sources after scrapping, which causes mercury to diffuse into the air, endangering human health and polluting the environment.
Due to the difficulty of recycling and the low value of recycling, coupled with its many other ills, the solution is to eliminate it.
Three, energy-saving lamps have some shortcomings 1, mercury pollution in the production process and after the use of waste, the current Western countries pay considerable attention to mercury pollution.
Chinese people are also increasingly aware of the dangers of mercury pollution.
2, because it is a glass product, easy to break, not easy to transport, not easy to install. 3. Its power consumption is still too large.
4, easy to damage, short life, energy saving does not save money this sentence is a good portrayal of it.
Four, LED lights have what advantages 1, energy saving.
The energy consumption of white LED is only 1/10 of incandescent lamp and 1/4 of energy-saving lamp. 2, longevity.
The service life can reach more than 100 thousand hours, which can be described as 'once and for all' for ordinary home lighting . 3, can work at high speed.
If the energy-saving lamp is frequently started or turned off, the filament will be blackened and quickly broken.
4, solid state packaging, belongs to the cold light source type.
Therefore, it is very convenient to transport and install, can be installed in any miniature and closed equipment, is not afraid of vibration, and basically does not need to consider heat dissipation.
5. LED technology is progressing with each passing day. Its luminous efficiency is making amazing breakthroughs and its price is also decreasing.
The era of a white LED entering the family is rapidly coming. 6, environmental protection, no mercury harmful substances.
The assembly parts of LED lights can be easily disassembled and assembled, and can be recycled by others without the manufacturer's recycling.
Summary: Obviously, as long as the cost of led lamps decreases with the continuous improvement of led technology.
Energy-saving lamps and incandescent lamps will inevitably be replaced by LED lamps.
At present, the country is paying more and more attention to lighting energy conservation and environmental protection issues, and has been vigorously promoting the use of LED lights.
In particular, the government's renovation of the street lamp project is first of all. Some time ago, a primary school in Jiangsu only had three street lamps, and the school indicated that it was necessary to replace the energy-saving lamps and incandescent lamps with LED street lamps.