At halloween, I flood my yard and walk way with around 400w of UV bulbs (mostly 6' tubes). It lights up the blowups in the yard. I also found that some of the Crayola sidewalk chalk paint glows under UV so I used the laser cutter and made bat, pumpkin and skull sponge cutouts. Me and the granddaughters have fun stamping the walkway and the really pop at night.

The UV makes kids costumes glow and the fog from the fog machine also is lightly UV reactive. I also have several dozen carved foam pumklins and real pumpkins we carve and put out each year.

As for the filament, I was thinking of making bat wings, devil horns, cat ears and various eyes to stick in real pumpkins using filament that glows under UV to enhance the display.

I would also think that UV reactive orange, yellow and green would be good for parts on tri, quad, hex copters for extra visibility.