So what kind of LEDs are streamlights C4 LEDs?

[Steveo]

Are Streamlights C4 LEDs crees or what? They are definately some of the brightest LEDs ive ever seen.

 

[gswitter]

It varies. Some "C4"s are Cree XR-E's, other have been reported as Lumileds Luxeon K2's.

 

[jzmtl]

It's whatever they happen to be using. Just a marketing term, nothing specific.