When you pay more attention to the LED light source high photosynthetic efficiency, energy saving, and the advantages of the LED lighting a very important advantages-no mercury, but is often neglected. We know that mercury is a kind of extremely toxic substances, but nearly most currently USES the efficient electric light source all contain mercury (mercury), whether common fluorescent lamp, compact energy-saving lamps, or high pressure mercury, metal halide lamp contain mercury.

          And the boiling point of mercury is very low, in normal temperature can evaporation. A waste away immediately after broken light source to send out around mercury vapor, the instant can make the surrounding air mercury concentrations up to 10-20 milligrams/cubic meters, more than the provisions of the state in the air the highest mercury allow concentration (for 0.01 mg/cubic meters) of the 1000 to 2000 times. According to the United States, at Stanford university, said the study by the mercury to 1 mg mercury pollution of drinking water, enough to 5454.5 kg of safe drinking can not reach the standard. Mercury pollution caused by air and water quality of very serious consequences, is the water biological edible will be generated CH3Hg, this is a kind of poisonous things, only half a earwax spoon can cause person in siming. Mercury itself can destroy the central nervous system, it caused by the effect of reproductive defects also is very serious, mercury can also damage the kidneys and liver, in doses of conditions can even enough to cause death. Mercury can in different ways in the soil, in water, and even the atmosphere, the food chain transfer. Therefore, durability, and easy transference and high degree of biological enrichment, become the mercury sex that the world's most compelling one of environmental pollutants.

         China recently the government free issued 100 million teams, although recently energy-saving lamps foreign special low mercury energy-saving lamps contain mercury quantity can be reduced to the following 5 mg (not to know that the Chinese government is such a low hair mercury energy-saving lamp), but does not reduce the hazards, because a such a low mercury energy-saving lamps of mercury is enough to pollution 27.27 tons of drinking water. 100 million cigarettes and energy-saving light enough to 2.7 billion tons of water pollution, equal to the national people's several years of water quantity.