I don't see this halo on either of my 2 SPY007s.
tpchan, are you sure you have tightened the bezel-ring as much as possible?
It can be tightened by placing the bezel-ring (while attached to the light) on the rubber sole of a shoe firmly
and then rotating the rest of the light clockwise.
If the halo is still there, then maybe the bezel-ring could be very slightly shortened by sanding the edge with the screw thread.
Obviously you should check with Data before doing this, I'm only trying to come up with helpful suggestions to eliminate the halo.