Serious professionals and operators should consider serious lighting. The Surefire Defender will answer all your needs.
If you need a no-nonsense, ultra bright flashlight, this is the product you've been looking for.
The Ultra puts out a blinding 500 lumens of crisp white LED lighting. Made of a rock solid aluminum housing, you can put this flashlight through the hardest of conditions. The major focus of the Defender is the Total Internal Reflection lens. This lense makes sure that you are getting all the possible light in a concentrated single beam of light.
The tailcap of the flashlight is where you can find the selector. The first click instantly fires off the 500 lumens. If you click again within a few seconds, offers 5 lumens of light for map reading and helps with light restrictions. Third click turns off the light.
Charge on the light will last 2.25 hours and will run off of the CR123 surefire batteries at 500 lumens. Using the five lumens setting the flashlight will last a whopping 67 hours.