Note even when the "energy saving" mode to have a low light over huge periods of time (190h according to the manufacturer to check anyway), sufficient for proximity lighting (eg reading).
We also appreciate certainly a good build quality (in spite of a plastic that does not seem very robust), with particular safe and comfortable headband, wide switch easily operable even with gloves, all its certification time "IPX4."
Anyway in the end we are probably worth the money, but no more either: it costs a little more expensive than ordinary front 9 by offering perks that will not revolutionize the use provided that one bit have such a product.