... accuracy .Specifications: Characteristics:High quality integrating spheres for LED and LED lamps only, nice streamlined shape design,high diffuse ... inside.Size(diameter)100mm,150mm,200mm,250mm,300mm,500mm,1000mm,1500mm,1750mm,2000m2500mm, 3000mmMain components:1.Optical Fiber ... tester to identify or compare the quality of LED lamps,fluorescent lamps, halogentor incandescent lamps,or appliances ...