BlackLite® filters are all dielectric thin films on borosilicate glass and offer some additional features over MUG-2. The transmitted efficiency is superior, which is critical in areas such as forensics, fluorescence and inspection. Because this is a coated filter, rather than a filter glass, heat produced by the light source is allowed to exit through the filter.
This lowers overall system temperature and can extend lamp life. Additionally, in high temperature applications where tempered MUG-2 is not adequate, BlackLite® may be suitable due to its Borofloat® substrate. For entertainment lighting MUG-2 is usually specified instead of Blacklite® due to lower cost.