Originally Posted by
Mmassey338
If you ride in fog a light on your head is not effective, it bounces back, but any other time having both lights is great. Reasonably priced too
Agreed. Certainly a helmet light is indespensible for single track, however.
Helmet lights totally washout any shadows making rocks and obstacles hard to see. And, they can be blinding riding by white street signs (i.e. speed limit). Not to mention they are a nightmare if you are riding with anyone else.
So, I tend to put a brighter light on my bars, and about 1/2 the power on my helmet (and turn it off if I really need to see road texture).