The Guardian Light is "dual function": you can choose between flashing and steady on modes. (To change modes, simply unscrew the bezel completely and flip the battery over. How cool is that?)
The Guardian Dual Function Light is available in Red or White: the white is brighter than the red, but the red is better as a safety beacon. And your night-adjusted eyes don't need to readjust after exposure to red light like they do after white light, but you already knew that.
Other features include: highly impact resistant, omnidirectional, waterproof to 300' (90 m), an operational range from -40 to 120 °F (-40 to 50 °C), 20 hours of use in steady function and 120 hours of use in flashing function. Can be seen for over 5 Km / 3 miles in the dark. Made in Canada to military/law enforcement specifications (not to be confused with the Made in China consumer version).
Visit the Guardian Dual Function Light page for more information, more pictures, or to order one separately.