COMMON BONDS, BENEFITS OF LEDS
These two lights are very similar in many different ways. Length and weight, output and lumens and ruggedness are just a few.
Where they also share a similarity is in Surefire’s use of LEDS or light-emitting diodes. Years ago, when I first saw Surefire begin adding LEDS to their line of lights, I saw a different type of white light. In looking into the head of the flashlight while the light is off, of course, I also viewed what appeared to be a chip or microchip of some sort. That chip I saw was the light emitting diode.
In wanting to build a light that can stand up to recoil, being dropped, or the perils of heavy combat, Surefire began using LEDS that offer a number of advantages over incandescent light. What an LED is first, is a semiconductor chip that converts electrical energy into light. It is classified as a solid state, so there are no gases or liquid components that are used to emit light. Other advantages with LEDS are that they are extremely rugged. Again, there are no gasses, bulbs or filaments to break. LEDS also can last thousands of hours, which means most people will never see the end of the life of an LED.
With the ability to manipulate and program LEDS with different energy sources, the ability to withstand vibration seen in handheld and weapon lights and the overall output of lumens, the use of LEDS in Surefire lights has been welcomed with open arms. While I am writing about LEDS, I will add a bit about the type of beam both of these lights emit. Total Internal Reflection (TIR) refers to the type of beam that is cast forward from the light. The TIR lens completely surrounds the LED, gathers all of the available light and then projects that light forward in a way that focuses the beam to be very tight in the center of the light emitted.
This type of lens is very useful when searching, as the cone offers up the brightest of light, so you can clearly and effectively identify your target. The remaining light that comes off the focused center helps illuminate items in the periphery. You can then move your light and/or weapon towards a target or threat if picked up in the outer light of cone. I like the TIR lens a lot and think it is a perfect reflector in both of these Surefire lights.