Product detail:The Xenotest 440 is a highly versatile xenon weathering instrument for a variety of materials. Designed for fast and economical testing, the Xenotest 440 utilizes XenoLogic™, a revolutionary new twin-lamp operating technology which enables high irradiance levels of 120 W/m2 of total UV radiation. In addition, XenoLogic provides extended lamp service life. With this new technology, the two xenon lamps combined can last over 4000 hours under standard testing levels of 40-60 W/m2.