Originally Posted by
youthcom
Not really questioning the usefulness & safety of a helmet light, but rather if a Fenix L2D on the helmet is riskier then a purpose built bike light. Dunno if bike specific light manufacturers design their helmet mountable lights in such a way that in the event of a crash it will break away & won't penetrate your helmet & your skull. But it seems to me that an L2D being a long small diameter tube of aluminum could potentially be more dangerous in the event of a head on crash.
I can't really picture how you would mount it that would be a risk on a head on crash. Wouldn't you mount it on top of the helmet? Or maybe on the side above your ear? Either way it's not going to penetrate your helmet.