BLUE LIGHT DETECTION, FLICKER MEASUREMENT, UV INSPECTIONLight is essential to human life. Since the electronic technology is getting matured each day, people are using light for not only illumination but also applying it to medical, agriculture and store display...and so on. People now are having awareness about "light" which can be harmful and beneficial to vision as well as our health. Now you can use OHSP Handheld Spectrometer to help you understand and analyze the characteristics of light, prevent damage from light more effectively and guard your health.