The most comprehensive independent source of information for comparing UVC lamp systems is a series of tests discussed in the 2006 test “Biological Inactivation Efficiency of HVAC In-Duct Ultraviolet Light Devices”. This testing was commissioned by the Environmental Protection Agency (EPA) in conjunction with the National Homeland Security Research Center and conducted by RTI International. This test confirms that, on average, Steril-Aire UVC emitters are 6 times more effective than their tested UV competitors on a Kill/Watt basis.
