I believe the "L" is the light and battery pack and the"R" is just the light. Both are the same light. Correct me if I'm wrong.

I own a Dinotte 140 and two PBSF. The Dinotte really does kick ass. Cars tend to go to the farthest lane just to get away from my light and that's a really good feeling. As you can tell, I really do enjoy my light.