What is the difference between ultraviolet sterilization lamp and ordinary fluorescent lamp

The difference between ultraviolet sterilization lamp and ordinary fluorescent lamp is that sterilization lamp does not need to convert the excited ultraviolet light into visible light. The wavelength is 253.7nm, and ultraviolet light can play a good sterilization role. The absorption spectrum of light waves by cells is regular. Cells absorb ultraviolet rays with a wavelength of 250 ~ 270nm. What is the effect of these ultraviolet rays absorbed by cells on cells? It can act on the genetic material of cells, i.e. DNA, which will play a photochemical role on cells. The energy of ultraviolet photons is absorbed by the base pairs in the DNA of cells, which will cause great variation of genetic material in cells. This is the same as the canceration of cells when people are irradiated with X-rays. Ultraviolet irradiation will cause bacteria to die immediately or fail to reproduce, In this way, the purpose of sterilization can be achieved.

Although the principle of ultraviolet sterilization lamp is the same as that of fluorescent lamp and energy-saving lamp, the materials used are different. Ordinary glass is used for ordinary fluorescent lamp, but such materials can not make the ultraviolet with the wavelength of 253.7nm penetrate, so ordinary glass cannot be used for ultraviolet sterilization lamp. So what material should be used to make the ultraviolet light more transparent? That is quartz glass. This material has a very high ultraviolet transmittance, which can reach 90%. Therefore, quartz glass is the * * material for sterilization lamp. Because the performance and thermal expansion coefficient of quartz glass are very different from ordinary glass, Therefore, the sealing of ultraviolet sterilization lamp can not use the circular sealing method with high degree of automation used in the manufacture of ordinary fluorescent lamp, but use the technology with high content of production and manufacturing technology. Therefore, the price of ultraviolet sterilization lamp on the market should be higher than that of ordinary energy-saving lamp.