Tested on track and road at night, illuminated like a car headlight on low beam, white and wide lighting. The lamp does not move, a strap to the top of the head is within ds box. Possible deactivate brightness sensor disturbed by my breath (condensation) and fog but then 435lumens limited power. This lamp by its weight but without it being annoying either. Allow kit to deport battery for comfort. I recommend this product.
