The light source is the core component of any solar simulator. It determines the spectral distribution, irradiance level, and overall performance of the system.<\/p>\n\n\n\n
Several types of light sources have been used in solar simulators. Among them, xenon arc lamps and LEDs are currently the most widely adopted technologies.<\/p>\n\n\n\n
Xenon arc lamps produce a continuous spectrum that resembles natural sunlight over a wide wavelength range. Because of this property, xenon lamps have long been used in solar simulator systems for photovoltaic testing and solar materials research.<\/p>\n\n\n\n
LEDs generate light at specific wavelengths. By combining multiple LEDs with carefully selected wavelengths, it is possible to construct a light source that approximates the solar spectrum. This approach allows flexible control of spectral composition.<\/p>\n\n\n\n
Although other types of lamps have been used historically, modern solar simulator design mainly focuses on xenon and LED technologies because of their performance and controllability.<\/p>\n\n\n\n