Yep, guilty as charged... That is the light shader I posted here in this very thread. I explained how I used it a bit here and in another thread about putting light inside something.

You can set the ray cutoff distance and simulate a Firefly point light all but perfectly as long as the camera is further away than the ray length or out of the cameras view. It works good in animations for street lights, as well. The large number of lights wont light the entire scene up all the way up down the street and the camera wont be able to see the emitter until the camera is within the ray length. There are far more things you can do with a setup like that using the other light path tricks in combination. 

It comes in very handy. I'm glad people are getting use out of it and creating cool renders with it.

On another note, this character is done. Coming to a runtime near you and it is for LaFemme 2.

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