LED light and energy saving lamp

Incandescent lamps were gradually eliminated, and they withdrew from the historical stage, leaving energy-saving lamps and led lights in the shopping. What is the difference between energy-saving lamps and led lamps? Which kind of lamp is better? First, the energy-saving lamps are the progress of incandescent lamps. The incandescent lamps are an important invention of Edison. This important invention has caused humanity to bid farewell to the darkness and usher in the light. But incandescent lamps are too power-hungry. It is probably less than one-tenth of the energy that turns into light energy. Others are wasted in thermal energy. So people are thinking of ways to replace incandescent lamps with new ones. Energy-saving lamps came into being. Because it is cheaper and better to make, it has a lot of applications, and there is a tendency to gradually replace incandescent lamps. Second, the principle of energy-saving lamps The two poles of energy-saving lamps are ordinary tungsten wires. When the tungsten wire is energized and heated, it can emit electrons. A relatively high voltage is applied across the tube to form an electric field, which is accelerated in the tube to form a stream of electrons of a certain velocity and energy. The lamp is vacuumed and filled with mercury, which we call mercury. In the case where the lamp is energized and heated, the mercury is vaporized from the liquid state. A mercury atom in a free state is formed. The electrons in the electron flow strike the mercury atom at a certain speed, causing the mercury atom to be excited and become an excited state. It is called a step, and the excited state of mercury spontaneously falls back to its original state after a short period of time, and emits ultraviolet light, which cannot be used for illumination. So we put some fluorescent substances on the inner wall of the tube. Under the bombardment of ultraviolet light, after the fluorescent substance is excited, we can emit more natural light, which can be used for our illumination. The more common energy-saving lamps on the market have general ordinary lamps and three-primary lamps that are gradually becoming mainstream. Compared with incandescent bulbs, they have the advantage of saving electricity. The difference is that the color rendering of ordinary lamps is low, while the lamps of the three primary colors show a natural sunlight color, and the color rendering and light efficiency are better than ordinary ordinary lamps. From the above we can know that mercury plays a mediating role in energy-saving lamps, and no mercury energy-saving lamps will not emit light. There is very little mercury in each tube. According to the investigation: a thick tube diameter fluorescent lamp with a diameter of 36 mm contains 25 to 45 mg of mercury, and a small diameter tube with a diameter of 26 mm contains 20 mg of mercury and a diameter of 10 mm. The compact fluorescent lamp contains 10 mg of mercury. Mercury is liquid at room temperature and is a flowable silver-white liquid metal. Mercury exists as a gas discharge medium in fluorescent tubes, which not only improves the light efficiency of the lamp, but also enriches the type of light source. Therefore, current energy-saving lamp sources contain mercury. Since the boiling point of mercury is very low, it can be evaporated at normal temperature. Immediately after the broken fluorescent tube is broken, mercury vapor is emitted to the surroundings, and the concentration of mercury in the surrounding air can be instantaneously 10 to 20 mg per cubic meter. The maximum allowable concentration in air is 0.01 mg per cubic meter. It can also flow with the air. Once the mercury entering the human body exceeds a certain threshold, it will destroy the central nervous system of the human body, causing great harm to the body. Mercury is difficult to remove after entering the human body. The workers in the factory have not been exposed to mercury for more than a decade, but now the body's mercury levels are still high, and mercury needles are still being used 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 lamps. The pollution is mainly caused by the electric light source being discarded after being scrapped. The rupture 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, and its many other ills, the only way is to eliminate it. Third, some of the shortcomings of energy-saving lamps 1, mercury pollution in the production process and after the use of waste, the current Western countries are paying 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 good transportation, not easy to install. 3, its power consumption is still a bit too big. 4, easy to damage, short life, energy saving does not save money, this sentence is its best portrayal. Fourth, what are the advantages of LED lights 1, energy saving. The energy consumption of white LEDs is only 1/10 of that of incandescent lamps, and 1/4 of energy-saving lamps. 2, longevity. The life expectancy can reach more than 100,000 hours. It can be said that it can be used for ordinary home lighting. It can work at high speed. If the energy-saving lamp starts or turns off the filament frequently, it will turn black and quickly break. 4, solid state packaging, is a type of cold light source. Therefore, it is very convenient to transport and install, can be installed in any miniature and closed equipment, is not afraid of vibration, basically does not need to consider heat dissipation. 5, LED technology is advancing with each passing day, its luminous efficiency is making amazing breakthroughs, and prices are constantly decreasing. The era of a white LED entering the home is coming quickly. 6, environmentally friendly, no harmful substances of mercury. The assembly parts of the LED lamp can be easily disassembled and assembled, and can be recycled by others without recycling by the manufacturer. Summary: Obviously, as long as the cost of LED lights decreases with the continuous improvement of LED technology. Energy-saving lamps and incandescent lamps are bound to be replaced by LED lights. 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 streetlight project was first of all. In the previous period, a primary school in Jiangsu only had three street lights. The school indicated that LED lights could be used to replace the energy-saving lamps and incandescent lamps.

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