A spectroradiometer is an optical measurement instrument used to measure the spectral power distribution of a light source, such as a lamp or LED, or the spectral reflectance and transmittance of materials. It works by splitting the light into its constituent wavelengths and measuring the intensity of each wavelength. Spectroradiometers are commonly used in colorimetry, photometry, and radiometry applications in industries such as lighting, display technology, and environmental monitoring. They are also used in research and development to characterize the spectral properties of materials and light sources.