The model DFSLMM is a UV light specifically designed for fluorescent application where you want the maximum MW at about 312nm in one light assembly. The DFSLMM stands for Dual Filter Short wave with two Medium wave lamps. The DFSLMM has two lamps (bulbs) each with a peak output at about 312 nm and two SW filters. Each lamp can be turned “on” and “off” independently. There are 13 different models of Dual TripleBright 3’s available depending on which lamp and UV filter combination are used, not all models are listed in this web site. For more information, please call or email.