The Legacy series represents those VIPIR lights that have set the standard for multifunction LE lights since 1995. Commissioned in almost every allied mission since the Gulf War these lights have proven their worth. Designed in cooperation with some of the world's most elite fighting forces, these lights have and continue to meet the challenges of real world applications, including IFF (Identification Friend or Foe), illumination and signaling in the harshest environments. AirForce: VIPIR DUAL SPECTRUM 5 LEDS (3 IR / 2 GREEN) - SPECIAL FLASH PATTERN This model closely resembles a standard strobe light in its flashing IR and green light mode. The slow beat, short flash strobe is easier on high end night vision goggles. The light also has an IR steadyon mode. Government Agent: VIPIR DUAL SPECTRUM 5 LEDS (3 IR / 2 GREEN) - SPECIAL FLASH PATTERN To prevent accidental overt illumination, this model features a one way bezel that needs to go through two IR modes before switching to overt light. The overt light position also has a programmed delay so that it can be dialed through without activating. The light has one IR, and one Green light steady-on mode and a programmed IR mode that incorporates a very distinctive flash pattern so it is not confused with any other ambient or IR light sources.