SureFire is now announcing their P2XIB, which auto-adjusts light amount to surrounding. This is a very nice feature that adjusts lights from 15 lumens to 600 lumens.
During the SHOT show it was one of items that looked promising. When light users go from one area to the next, having this kind of auto adjustment can reduce light splashing back in full force. Going from outside to inside and vice versa means light output has to be adjusted and this would be a good step towards it.
Price is $229
http://www.surefire.com/illumination/flashlights/p2x-fury-intellibeam.html
From: SureFire