Lighting effect of LED lamps

In the past, when we used incandescent lamps, we only knew how many watts of bulbs to use. The larger the wattage, the brighter it will be. This is correct. However, the wattage of a lamp actually only represents how much power it consumes, not how much light it emits. This problem has become more and more important with the emergence of different types of lamps. The emergence of fluorescent lamps has caused problems. The early use of fluorescent lamps is usually called fluorescent lamps. Fortunately, the universal fluorescent lamp is only 1. 2m T8 lamp tube. Therefore, we do not know how many watts it consumes. We only know that it saves more electricity than ordinary incandescent lamps. In fact, the power consumption of this ordinary fluorescent lamp also depends on what kind of ballast is used. The lamp tube itself is 36 watts. If the domestic inductive ballast is used, the power consumption of 10W is usually added, so the power consumption of the whole lamp is 46 watts. The average user may not know. After the emergence of 'energy-saving lamps', new situations have emerged. In fact, the so-called energy-saving lamps are just a kind of curved fine fluorescent lamps, calling it an energy-saving lamp is just to beautify it with the new term 'energy saving. The commonly used energy-saving lamp is 8 W, its brightness is equivalent to 40 W incandescent lamp. However, the big disadvantage of energy-saving lamps is that they contain mercury, which can pollute 180 tons of water and soil each. However, the country has done its utmost to promote 'energy-saving lamps'. In Shanghai, even every household is sent by the state for a white use (I don't know if there is a big company behind) Since the national promotion to the end of 2012, hundreds of millions of energy-saving lamps have been scrapped and have polluted 18 billion tons of water and soil, and this kind of pollution cannot be removed. It is no wonder that it is rumored on the Internet that Chinese immigrants found that the mercury content in their bodies exceeded 100 times when they went to the United States for physical examination. This is not surprising. One. LED bulb lamp LED is a kind of lamp that does not contain mercury and has much higher light efficiency than 'energy-saving lamp'. It is the real energy-saving lamp. It is bound to become the mainstream product of lighting fixtures. Moreover, it has appeared lamps of various shapes, including bulb lamps that can replace incandescent lamps, LED lamps that replace fluorescent lamps, LED ceiling lamps, LED downlights, led par lamps, etc. In order to save energy, all countries have set a deadline for prohibiting the production and sale of incandescent lamps. • Australia: 2010 • EU, Taiwan, Canada: 2012 • Korea: 2013 •Japan: 2012 (High energy)• US: 2014 completely banned • , China: 2016 comprehensive ban in 2014,10 1 ban import and sales 60, more than the incandescent lamp according to estimation 2014 due to American and multinational disable incandescent lamp LED bulb lamp demand growth 86. Therefore, we will focus on LED bulb lamps used to replace incandescent lamps. In order to make it easy for users to accept, LED bulb lamps are specially made to be similar in appearance and size to incandescent lamps, and the Lamp caps are exactly the same for easy replacement. At present, the wattage consumed by LED is widely used as its main index in China. This has formed a big loophole. Some bulb lamps with low light efficiency have a target of 1 yuan per watt, while slightly better bulb lamps have a target of 2 yuan per watt. This is a very unscientific cost-effective indicator. Because some bulb lamps with low luminous efficiency consume a lot of electricity but cannot emit a lot of luminous flux, they are also known as large wattage. They sound like good bulbs, but they are actually shoddy products. The correct indicator should be its luminous efficiency. This is the issue to be discussed carefully in this article.