The Tektite Mark III is the brightest marker light available. Uses your choice of 1, 2 or 4 LEDs that provide up to 200 hours of light. The Mark III is for use in situations where higher ambient light requires a high-intensity light.The Mark III is also well suited for use as a traffic marshalling wand or area light. Available in your choice of four lens colors. Comes with a bungee lanyard.