blue (blood trail), green (reading maps/charts) and infrared (night vision compatible) filters, beam diffusers, beam covers, lanyards, pouches/holsters and spare battery/bulb carriers. Some models use incandescent bulbs, while most others use LEDs with electronically controlled power regulation and adjustable brightness. The company used Seoul Semiconductor and Cree XR-E LEDs in flashlights introduced in 2007. More recently, flashlights with a strobe function, used for signalling or to disorientate were introduced. A more notable product is the SureFire M6 Guardian, a flashlight with a 250 or 500 lumen beam from a xenon bulb. Fifteen M6 flashlights were used to illuminate the Stonehenge for the June 2008 cover photo of National Geographic Magazine. The New York Times referred to the M6 as being of the "design school that might be called Modern Militant, the most familiar example of which is the Hummer." This was later used in SureFire's 2007 product catalogue. See also Insight Technology Pelican Products References External links Official SureFire website SureFire Flashlight comparisons Flashlights Lighting brands Manufacturing companies based in California Companies based in Orange County, California Fountain Valley, California Electronics companies established in 1979 1979 establishments in California Manufacturing companies established in 1979