LGY-20 cold light source is a outdoor bright field lighting for microscope, using high power LED up to 20W, standard with dual head multidirectional fiber optic guider output, brightness can be compared to traditional 150W halogen lamps, and the color temperature constant, low heat, and a long life. LGY-20 cold light source is a outdoor bright field lighting for microscope, using high power LED up to 20W, standard with dual head multidirectional fiber optic guider output, brightness can be compared to traditional 150W halogen lamps,