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This review is from: Topeak Headlux, Cycling helmet light (Sports)
great wee helmet light. It lets other road users see you from a good distance.
The flash mode is great, the only down side is the front one gives in after about 30 minutes, but the back keeps flashing.
Not bad value for the price. It requires a couple of zip ties to secure it properly to your helmet though as the velcro strap supplied is a bit too flimsy.