Up to the task of bringing light to your immediate area indoors or outdoors, the Surefire flashlight is a portable light source. Shine your light as long as you need to by taking advantage of the running time of 175 hours on this Surefire U2 Ultra. This flashlight is well-designed and convenient, and it allows you to bring it along as your personal light source and use it in almost any setting. The Surefire flashlight is very bright, with 100 lumens of light output, which enables you to point a light beam to make subjects visible with confidence.