This is a great idea, but the light is not very powerful. In fact, this is great if you are star gazing and want to check your star chart because the illumination is dim enough that you won't wipe out your night vision. The "on" mechanism is clumsy to use with one hand and still point in the direction you want, and the light won't stay on unless you hold it. That's good in that you won't wear out your battery, but bad in that you might just go to the sporting goods store and buy one of those little bright lights that do everything much easier. If I do give these to my customers, I'll have to give them with some explanation (and apologies). Sigh. And if I don't, I'll have years and years of lights to use for looking at my star charts.