RenRob wrote:

This is as close as I got on the pdn orb. I made a circular selection and filled it with a black to red radial gradient. Then added highlighting at the top similar to this tutorial (just reversed the gradient). The background isn't quite right. I used the light rays add-in with bright red foreground and added zoom and gradient blurs. That should get you close.
That's pretty good, actually...the one in the PDN fanatics logo has one additional larger highlight with a lower opacity (look close, and you'll see it). Background was added white noise plus zoom blur deluxe on top of some random lines with radial blur applied.