LED Measurement Features Measure LED optical output in Luminous & Radiant Flux, spectral irradiance and LUX, microwatts/cm2, moles per second, PAR, Footcandles, CRI & CQS LED Measurement Systems include a miniature spectrometer, a fiber optic cable (or direct attachment), a light collecting accessory/integrating sphere, and a NIST traceable intensity calibration Real-time 1931 CIE Chromaticity diagram for xy Chromaticity, Dominant Wavelength, Purity, and Correlated Color Temperature (CCT) LED Testing spectrometers available to cover the 200-1700nm range