LED lighting advantages: no mercury

When everyone pays attention to the advantages of LED light source with high luminous efficiency and energy saving, LED lighting has a very important advantage - no mercury, but it is often overlooked. We know that mercury is an extremely toxic substance, but almost all currently used High-efficiency electric light sources contain mercury (mercury), whether they are common fluorescent lamps, compact energy-saving lamps, or high-pressure mercury, metal halide lamps, etc., which contain mercury.

The boiling point of mercury is very low, and it can evaporate at room temperature. After a broken discarded light source is broken, mercury vapor is immediately emitted to the surroundings, and the concentration of mercury in the ambient air can reach 10-20 mg/m3 instantly, exceeding the national regulations. The maximum allowable concentration of mercury in the air (from 0.01 mg/m3) is 1000 to 2000 times. According to the Stanford University study on mercury, 1 mg of mercury is enough to contaminate 5454.5 kg of drinking water, making it unable to meet safe drinking standards. The consequences of air and water pollution caused by mercury are very serious. After being eaten by aquatic organisms, it will produce CH3Hg, which is a highly toxic substance. As long as half an ear spoon can cause death, mercury itself will destroy the central nervous system. The effect of reproductive defects caused by it is also very serious. Mercury can also damage the kidneys and liver. It can even cause death in sufficient doses. Mercury can be transported in different ways in the soil, in the water stream, even in the atmosphere, in the food chain. Therefore, persistence, easy mobility, and high bio-concentration make mercury one of the world's most attractive environmental pollutants. The most serious mercury poisoning incident in history is considered to be Japan. The Minamata disease was caused by the death of hundreds of people when the water in Minamata Bay was contaminated with mercury. The Japanese government has learned the lesson and demanded that all obsolete fluorescent lamps must be treated with toxic substances, requiring people to buy ordinary fluorescent lamps. 2. It is necessary to pay double the price to prepay this poisonous substance treatment fee.

Recently, the Chinese government issued 100 million energy-saving lamps free of charge. Although recently, the mercury content of special low-mercury energy-saving lamps abroad can be reduced to less than 5 mg (it is not known whether the Chinese government issued such low-mercury energy-saving lamps), but in the slightest It did not reduce its harmfulness because the mercury content of such a low-mercury energy-saving lamp was enough to contaminate 27.27 tons of drinking water, and 100 million energy-saving lamps were enough to pollute 2.7 billion tons of water, which was equivalent to the amount of drinking water of the people throughout the country for several years. .