The Hoover 4-in-1 Mattress Cleaner goes beyond just sucking up dust. Its standout feature has to be its UV-C light technology ...

and an LED module was all it took to build a handheld UV curing light. The good news is you don’t need a resin printer to take advantage of the process — just the resin. He also points out ...

I did so with a small handheld UV LED light to visualize the deposited resin. It had no immediate effect on curing the resin when used in this way, but I still kept the UV away from the brushes ...