Streamlight Inc.'s PolyTac 90 LED is a super-bright and compact right-angle personal light that features the latest in C4 LED technology. Like the original PolyTac and PolyTac LED, the light features high and low intensity modes, but adds the versatility of a right-angle housing and D-ring, so it can be easily attached to a jacket, belt or headstrap. The PolyTac 90 LED features power C4 LED technology and offers microprocessor-controlled high and low intensity modes, and a strobe setting. On the high setting, the light delivers 7,000 candela peak beam intensity and 170 lumens measured system output and provides 3 hours and 45 minutes of continuous run time. On the low setting, the PolyTac 90 LED offers 30 hours of run time, and on the strobe setting, 6 hours. The C4 LED is impervious to shock with a 50,000 hour lifetime. Made from high- impact, super-tough nylon polymer, the PolyTac 90 LED offers exceptional durability and a sure grip. It includes an integrated carabiner style D-ring for a variety of attachment methods and a rotating, reversible and removal clip that provides several mounting options. The light features a head-mounted push button switch that provides one-handed momentary or constant “on” operation. A double click activates the strobe mode, while a triple click activates the low mode. The PolyTac 90 LED uses two 3-volt lithium batteries with a shelf life of 10 years.