These are decent lights for navigating the woods in the dark, but if you do...get two of them. They like to cut out often, requiring a sharp rap to get working again...then they work just fine for a bit...and repeat the entire scenario all over again. It is as though the contacts are inferior and unable to provide a constant load to the LED bulb.Why do they send more of those stupid nylon sheaths? I have to have at least twenty of them now over the years, and have yet to actually find any use for any of them.On a positive note, they are plenty bright, and the batteries last quite a while, if they would just always work as they should, they would be great...but they just plain do not...not at all dependable.