Streamlight 65020 Stylus 3-AAAA LED Pen Light, Black with Navigation Green Beam
From Streamlight

Amazon Sales Rank: #20633 in Home Improvement Color: Green Brand: Streamlight Model: 65020 Number of items: 1 Dimensions: 1.09 pounds
Ultra slim, waterproof, LED pen light. 100,000 hour green LED is visible from over a mile away. Green LED allows hunters to be seen without spooking game. Features momentary blink or constant ¿on¿ switching. Aluminum body with ridged grip and pocket clip. three AAAA alkaline batteries included in purchase.
most practical flashlight ever! The stylus is the single most practical and convenient flashlight I have ever owned. It is so small that you can carry one just about anywhere. I have used these lights for everything from looking for keys dropped under a couch to map-reading in my car and even as a supplemental light on search and rescue missions. The green light is plenty bright, and in many respects better than the white light version as it won't hurt your night vision -- and won't bother people if you turn it on at the opera to look at the program. One of my faves I love these things. I got a couple of the green LED to preserve night vision and the white LED ones just to be "normal" ;) It's tough: LED/light technology is just out of this world ... you can get amazing/blinding beams (pro/con) for cheap and I'll as often go to my keychain light. But the nice thing about this little baton is that it's SOLID and looks serious... seems like the correct tool for pros in the medical or tech fields...or if you're a hunter hahha. It feels great in the hand and I always keep one in my satchel or glovebox. Decent throw, good light... if you're an uber-light geek, this won't replace anything you've got based on lux-capacity ;) It's the form and function of it, the warranty, and just your obsession with having every kind of light that would lead you to pick up one of these. I still think I'd get the green LED lights to rationalize getting more of these since I have so many lights already. I gave one to my buddy who has a newborn in case it helps him move around the room without disturbing his munchkin... who knows if it'll work that way ;) Great thing about these is that while you might mistake them for a pen, you're not going to lose them in your bag or glove like you would a smaller light. Too much light Originally I had wanted a small instrument which I could use to write in a low or no light situation without disturbing anyone sitting next to me in a conference or theatre. Even before I started worrying about finding replacement AAAA batteries, I lost my LED pen. Unfortunately the instrument shone more light than a neighbor would comfortably allow.