GMS-1600 goniophotometer is a type C goniophotometer used to measure the luminous intensity distribution, chromaticity uniformity and spatial spectrum distribution for LED lamp, PAR lamps, flush light panel and other small size lamps. The luminaire rotates around the vertical axis on its burning position while detector is rotating around the luminous center in the vertical plane. The goniophotometer has the advantages with fixed luminaire position, no mirrors in the optical ways, and less laboratory space occupied.