Supposedly this light of which you speak detects mold.
Nothing kills mold.
Mold must be physically removed.
Having endured hurricanes Frances and Jeanne within 3 week's then the overwhelming aftermaths in my area on the ocean, I discovered spraying full strength hydrogen peroxide on to the suspected area enables the mold to disipate...even applying it to walls, furniture, carpeting, baseboards, drywall, etc...any areas I suspect might have been infected.
(Of course complete renovation is the best course of action.)
I have cleaned well over 75 crawl spaces under homes filled with mold and literally swept the mold in to a plastic bucket; secured it in tightly closed plastic bags then discarded it immediately.
I have been cleaning hurricane debris going on 1-1/2 years now attempting to bring homes to a safer environment; and it never ceases to amaze me how residents are becoming ill with a "mysterious" cough and other like symptoms. A few of my clients have passed away in a matter of months.