Why a flashing light? I think flashing front lights are the worst development in cycling in years. While you may think that being seen is the most important thing in the world, being misunderstood makes it worse.
Flashing lights carry a meaning in the traffic world. They're either used for emergency vehicles, or turning movements, or warning lights for stopped vehicles. Confusing a driver doesn't make them safer.

What I love seeing is a rider at night with a flashing front light, but he's wearing all black.