I am something of a flashlight fanatic, and I have pretty much tried them all.
The Big Ed (Pelican) light is not bad (halogen)
The Streamlight Survivor, Halogen (or Xenon, or Kripton, or whatever they call it) Smokecutter is, in my opinion, absolutley the best flashlight ever sold for use in a smoke filled environment. I have also tried the LED version, and yes it does offer some benefits, but if you're doing a search or on an attack line, all you see is a big blob of blinding purple-blue light reflected back at you. Can't see a thing. The halogen bulb really cuts through it better.
Now for overhaul, or for a vehicle extrication, or other activity the LED works well.
And yes, the Vantage C4 helmet light is brighter than holy hell, but still doesn't cut the smoke.
I have my trusty Streamlight Old School on my coat, and a Vantage on my helmet. Best of bost worlds. (By the way, at night blood looks really,,,,,wierd under the Vantage. If your working on a patient. And your buddies will all hate you, because when you turn to talk to them you burn their eyes right out of the sockets)
Bob