Combining output of 30 discrete LEDs, each with different center wavelength, SpectralLED lets manufacturers perform diverse calibration and testing with one instrument. Unit can be programed to produce output that closely matches any illuminant source or spectrum of any illuminant reflected by target. Without any moving parts, unit can also be swept through wavelengths to simulate scanning monochromator. All source calibration data, RMS fitting, and spectral presets are managed internally.