Solar Simulator IEC/JIS/ASTM, 450 W Xenon, 2 x 2 is used in the generation of solar spectra, which is necessary for the evaluation of the Volt-Ampere characteristic of solar cells. The 94023A is the Sol3A Class AAA Solar Simulator with a 450 Watt Xenon source and 2 x 2 in. illuminated area. All Oriel Sol3A simulators are certified to IEC 60904-9 Edition 2 (2007), JIS C 8912, and ASTM E 927-05 standards for Spectral Match, Non-Uniformity of Irradiance, and Temporal Instability of Irradiance. The Oriel Sol3A simulators all use a single lamp design to meet all three performance criteria without compromising the 1 Sun output power, providing true Class AAA performance. A Variable aperture accessory provides user the ability to vary the illumination on Sol3A simulators without adjusting the power supply. The range of attenuation is infinitely variable from 0.1 - 1Sun. The Oriel Sol3A uses a black non-reflective finish to minimize stray light and incorporates captive screws for all panels requiring user access to facilitate lamp replacement, alignment, and filter changes. Safety interlocks prevent inadvertent exposure to UV light.