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At CTL, all photometry parameters like Total Luminous Flux, Luminous Intensity Distribution, Luminous Efficacy, Color Characteristics can be tested in Integrated Sphere for performance testing of Lamp/Luminaries. This test is covered in LM 79, IS 16106, IS 16102 (Part 2), IS 15111(Part 2), IS 2418 and various other Indian as well as International Standards.
Integrating Sphere is used for a variety of optical, photometric or radiometric measurements. It can be used to measure the diffuse reflectance of surfaces, providing an average over all angles of illumination and observation.