Originally Posted by
Looigi
In my experience, when helmet mounting lights like the Exp, it's best to put them squarely on top of the helmet due to their length and weight. This keeps the helmet better balanced and positioned on your head and can be less tiring, particularly when mtbing in rough terrain.
Another factor to consider is the riding position of the rider. Both my wife & I wear the same type helmet with a
Trustfire AA flashlight secured by a Zefal Doodad. My riding position is more aggressive, leaning forward...my helmet light is mounted centered and slightly to the rear. Her riding position is more upright...her helmet light is mounted centered and slightly to the front. We run our helmet lights mostly on strobe mode. YMMV.