1. Design service life. The following factors have a greater impact on the life of UV lamps.

A. Pipe wall load. The life of the lamp with a large load is low, and the same working current, the life of the lamp is shorter if the diameter of the lamp is small.

B. Working voltage. The lamp voltage is too high and the service life is low.

C, power density. High power density and low lamp life.

2. Materials. The quality of the quartz glass on the tube wall has a great influence on the life of the lamp. Good quartz glass has high purity, no bubbles inside, and smooth surface. Because the temperature of the tube wall is generally above 600 °C, if the purity is not enough and there are impurities, the glass surface will gasify, resulting in many tiny pits, which will affect the ultraviolet radiation out of the tube wall. The domestic quartz tube can be intuitively seen with the eyes that there are air bubbles in the tube wall, which affects the ultraviolet radiation out of the tube wall. The electrode material is generally a layer of barium zirconate or other cathode emitting materials fired on the surface of the tungsten wire. The aging resistance and temperature resistance of tungsten wire and cathode material directly affect the life of the electrode.

3, the production process. This factor is an important factor restricting the quality of domestic UV lamps. The main processes that affect the service life of the lamp are: cleaning the inner wall of the lamp, vacuuming, the purity and injection amount of mercury, the amount of argon gas charging and discharging, electrode lead welding, cathode material sintering, etc. The whole process should be carried out in a clean place; cathode material sintering, welding and sealing, etc. should be completed under vacuum conditions. At present, domestic manufacturers of UV lamps do not have these conditions, which greatly affects the life of the lamps.