ULG-1800 can be applied to measure optical parameters for various kinds of LED street lights, luminaries indoor or outdoor. In detail, it can measure spatial intensity distribution curve, cross section spatial intensity distribution curve, isolux distribution curve, luminance limitation curve, area luminous flux, luminaries efficiency, glare class, total luminous flux, effective luminous flux, utilization factor, etc. Test data format meets international standard, can be output in IESNAL format and directly used in international illuminant design software.