Alright guys, by browsing some I see that I am way out of my knowledge area with flashlights. A member on Bladeforums sent me here so I need your help please. We have been carrying Surefire 6Ps (non LED) at work until about a year ago and then we got some Streamlight LEDs. One of my co-workers just bought a Surefire 6P LED and it appears much brighter than my Streamlight. My question is, can I buy a Cree LED "lamp" and drop it right into my old Surefire 6P and equal the new 6P LED? If so, what model number do I need? Does Surefire use the Cree? This seems almost too simple to me as an upgrade from Surefire is much more expensive. Sorry for the elementary question but I would like to use my old 6P again as at least a second light if the Cree is as ultra reliable as factory Surefire. So is it as reliable with Cree? Thanks in advance from a newbie.