LED solar simulators generate simulated sunlight using arrays of light-emitting diodes with different wavelengths. By combining LEDs with carefully selected spectral peaks, it is possible to construct a light source that approximates the solar spectrum.
One advantage of LED technology is its controllability. Individual LED channels can be adjusted independently, allowing flexible control of spectral composition and irradiance levels.
LED-based systems also offer long operational lifetimes and stable output characteristics. These features can reduce maintenance requirements and enable highly repeatable measurements.
Because of these characteristics, LED solar simulators are increasingly used in applications that require programmable spectral conditions or rapid switching of illumination.