These are simply the best set of flashers I've ever had. It's what's inside the small form factor, lightweight lights that makes them stellar performers. See.Sense. avoids using a narrow beam of light, and instead uses a fresnel lens to disperse the light more than 180 degrees. The lights are super bright only when they need to be – in places where a cyclist is most at risk, such as at intersections, in traffic, riding through an underpass or facing oncoming headlights at night. ICON reacts to your situation on the road, flashing brighter and faster at these critical times.