Integrating Sphere-Spectroradiometer Test System
It can measure optical parameters such as luminous flux, color rendering index, correlated color temperature, chromaticity coordinates, etc. 

Which provides parameters like Irradiance (W/cm2), Illuminance (lux or fc), Radiance (W/sr), Luminance (cd), Flux (Lumens or Watts), Chromaticity, Color Temperature, Peak and Dominant Wavelength. Also allow calculation of PAR μmol/m2/s, Metamerism, and candela calculations based on distance and include features like 2- and 20-degree observer, baseline overlay comparisons, transmission and reflectance.