Ultraviolet lamp is a kind of device that can emit ultraviolet rays. It is a necessary tool to observe the fluorescence and phosphorescence characteristics of samples. It is also a physical means for sterilization. The wavelength is in the range of 10 ~ 400 nm. Ultraviolet is a kind of low-energy electromagnetic wave, which is widely used in medical treatment, health and epidemic prevention, food industry, pharmaceutical industry and other departments because of its good bactericidal effect. But how to use the ultraviolet lamp correctly to ensure its germicidal efficacy, prolong the service life of the lamp tube and avoid accidental injury is the requirement for every operator to master it first.