what a waste of money . this be not a lead light , and do not come close to the performance of a lead light at half the price ! guess we be pay for the name and the lifetime warranty . this one will easily last a lifetime , sit unused in a drawer . buy it for my medical career wife -lrb- she like purple -rrb- but it be clumsy for she to turn on , concentrate the beam , then turn off with one hand . buy she a 99-cent tear-drop shaped keychain lead light on a whim and its perfect . brighter and easier to use , replaceable battery , and 1\/7 the cost . I really expect more from this company , but both this light and they customer perspective be obsolete . no complaint with the quality of construction . solid aluminum and o-ring as usual . just have the minor flaw of cast a weak and scattered beam , way below the performance of modern led technology . the light be yellow and full of shadow artifact that prevent a clean illumination . not a good buy ; do not repeat my mistake !