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LED Bulb Development Prospects
Dec 21, 2018

For a long time, people have not used LEDs for illumination, mainly because LEDs usually only emit red or yellow light. In order to obtain white light, it is necessary to produce a light-emitting diode that emits blue light. In this way, after the three lights of red, yellow and blue are "mixed", white light is produced. This problem that has troubled people has finally been solved. Scientists have discovered a new type of semiconductor material, gallium nitride, which emits blue light after proper treatment. After the problem of blue light is solved, there is hope for the problem of white light. Colin Humphreys of the Department of Materials at the University of Cambridge in the United Kingdom said that they have developed white light-emitting diode bulbs in the experiment. The light emitted by the bulb is very close to the sunlight and has a good application prospect. He said that LED bulbs are made of semiconductors. Therefore, the illuminators can be made very small, only a few millimeters, and mounted on walls or ceilings. If they are not turned on, they are almost imperceptible. It eliminates the need for a common incandescent lamp to be equipped with a lampshade to prevent light from puncturing the eyes. In addition, the life of this kind of bulb is very long, and there is almost no need to replace it after it is installed. In the future, people may forget how to change the bulb. He is calling on the British government to increase investment to ensure that the UK is at the forefront of this technology. In addition to being durable, this type of bulb has great potential for energy savings. According to calculations, if half of the bulbs in the United States use LED bulbs, 24 stations can be shut down, saving billions of dollars and CO2 emissions will drop significantly. For this reason, the United States has planned to use LED bulbs for all traffic lights by 2006, saving $750 per year per intersection. Despite the many benefits of this kind of light bulb, there are two major obstacles to truly entering the ordinary family. First, the price is too high, the price of each bulb is 30 pounds, while the average incandescent bulb is only 35 pence, the gap is too big. Second, it is still difficult to produce a white light bulb suitable for home use.