Do Blacklight LED Spotlights work?

The following is a small experiment with UV LEDs to determine if a small UV LED could work.  The spot was created with 5 5mm UV LEDs, < 395 mm from Light of Victory in  Hong Kong.  They did not come with an mcd rating, only stated intensely bright.  50 LED cost me $9.99, including shipping, and I plan on making 10 LED spots with 5 LEDs each.  Count the battery clip and resistors that's around $1.25 per spot not including housing (I use old PVC).

18" Black Light on the left, 5 5mm UV LED spot on the right from about 7-8 feet.  FCG not a good application for a UV spot, need wide angle black light.

18" Black Light on the left, 5 5mm UV LED spot on the right from about 3 feet.   Very little difference in the bottle of UV reactive paint.  You can see how the left side of the table is dark in the spotlight picture on the right.  Based on this, focused black light reactive displays will be as bright with this small LED spot as they will a full black light if distance of LED spot is kept to 3 feet or so.