As usual, I might be missing something here. UV light is pretty much always "dim" as perceived by human eyes, unless it is so strong that it is dangerous. The light in question is a "mini" light, so it probably can not physically put out too much power. If anyone finds a decent handheld, battery powered light that does not need batteries to be changed (or charged), please let me know!! When using a UV light to catalyze these things, usually the light source needs to be held VERY close (millimeters) to the material. I'm not trying to be a smarta$$ about this, just throwing out some things based on years of experience working with many types of UV, IR, and other illuminators.
The light I use for catalyzing Loon UV products is a 42LED 380nm forensic inspection light powered by 3 AAA batteries. It cures the stuff very well, but of course it goes through batteries pretty fast.