Already, the lamp powered by 3 AAA batteries (supplied by the manufacturer). The lamp is light, it weighs 54g and 900g with batteries. Even at this level, you will not be embarrassed. Furthermore, the elastic around the head, does not hurt and holds well.
The lamp is very easy to use: a center button. It allows you to access multiple modes.
Already, you have 2 mode LEDs that goes from 4 to 90 lumens, so you can illuminate up to 40 meters! I did the test up in my basement, no need to have a flashlight or use my mobile as a lamp, then I had a free hand and I could see very well from a distance. At full capacity, the lamp is designed to last 43 hours! You see what come.
And the least bright fashion: you can illuminate up to 25 meters.
Athletes, running throughout the year and even at night, can easily light their way especially for those in the country!
There is a flash light mode, ideal for cycling. There is also a night mode (red light), I personally do not see what's the point. If need be biking for that one cue you if you stow the luggage rack.
An ultra positive point is that the lamp is resistant to rain (there is the small logo on the box) or that, it's really great because, you know, when you are camping and it starts raining, you need to light up a tent and there you are helped.