Spectrometer 1)meet the requirements of gb & cie 2)tested luminaires installation with cross laser aiming 3)intelligent photodetector with fine v(d) correction 4)photometric accuracy: first-grade standard 5)angle accuracy: ¦0.2¦ 6)testing optical distance: 0.5m, 1m, 1.6m 7)range of effective intensity: 0.1lx - 30, 000lx 8)spread angle of light beam: (50%), (75%), (25%) 9)measuring data can be applied for lighting design by other lighting softwares 10) rs-232c interface, based on window sxp/2000