What a waste of money. This is NOT an LED light, and does not come close to the performance of an LED light at half the price! Guess we're paying for the name and the lifetime warranty. This one will easily last a lifetime, sitting unused in a drawer. Bought it for my medical career wife (she likes purple) but it is clumsy for her to turn on, concentrate the beam, then turn off with one hand. Bought her a 99-cent tear-drop shaped keychain LED light on a whim and its perfect. Brighter and easier to use, replaceable battery, and 1/7 the cost. I really expected more from this company, but both this light and their customer perspective are obsolete. No complaint with the quality of construction. Solid aluminum and O-rings as usual. Just has the minor flaw of casting a weak and scattered beam, way below the performance of modern LED technology. The light is yellow and full of shadow artifacts that prevent a clean illumination. Not a good buy; don't repeat my mistake!