Ultraviolet ray sterilizing lamp as a short example of easy and convenient to use disinfection equipment, widely used in health and epidemic prevention, biological, pharmaceutical, food, scientific research departments and so on. Through our research, we found that intensity of ultraviolet (uv) light source not only relate to the temperature, humidity and uv lamp itself quality, and have great relationship with the ballast. According to the specification of ultraviolet disinfection, issued by the ministry of health when the power supply voltage of 220 v, 253. 7 nm wavelength of ultraviolet radiation intensity is not less than 70 mu W/cm2, uv intensity directly influence the effect of disinfection. Electronic ballast with saving energy and reducing consumption, low voltage start quickly, high power factor, etc. As the replacement of the fluorescent lamp, but basic is not in ultraviolet ray sterilizing lamp applications, investigate its reason, mainly is the cost is too high, high failure rate. In addition, many commercially available products quality closes nevertheless, the power factor is low. But we found that through the experiment with a lamp switch to electronic ballasts, power consumption can reduce more than 25%, and the intensity of radiation can increase by more than 12%, and the tube service life greatly extended. Especially for some use inductance ballasts and the intensity of radiation can not meet the disinfection requirements and replaced the old lamp, as long as the radiation intensity in more than 60 mu W/cm2, switch to electronic ballasts, basic can meet the use requirements. Electronic ballast for the power supply voltage requirements is not high, as long as the power supply voltage is higher than 180 v, can be reached 70 mu W/cm2 minimum standards for radiation intensity. To replace the traditional ballast with electronic ballast, although one-time investment is higher, Our experiment with electronic ballast is 30 yuan) , but in the long run, the potential economic benefit is very considerable. If a hospital has 100 tubes, use 2 hours a day, so, after the switch to electronic ballasts: 1. According to the calculated energy saving 25%, lamp life 1000 hours, can save electricity nearly 350 yuan a year. 2. According to each lamp 85 yuan, to extend the life of at least 100 hours, can save 900 yuan, that's two during the 100 tubes in their use can save 1200 yuan of above. And 100 electronic ballast only costs only 3000 yuan. If to remove the value of the inductance ballast, with a total investment of more small, will pay back your investment in soon. 3. The use of electronic ballast in the case of reducing power consumption, radiation intensity can be improved a lot, greatly extend the service life.