Is there a way to great a blacklight effect in superfly?
I've never tried that, but my initial guess is that you'd want to boost the intensity and saturation of diffuse/specular response.
Maybe using color math to add or multiply diffuse/specular and HSV to increase color saturation, or maybe use the LightPath node. To get discriminating response (from a violet light), maybe try using the color component nodes as masks to only boost response (via emission?) for violet light.
That's just thinking aloud; I haven't tried to do blacklight. I'm mostly busy lately working on support infrastructure and hardware.