The problem with buying a NightStar is that you have to shake it, or wind it (depending on model), the NightStar is the only brand that truly works and will last forever, the light is a tank, waterproof, LED, and a switch with no breakable parts, even the magnet is buffered at each end of it’s shake by opposing magnets so that it never actually contacts a physical barrier, and there is no rechargeable battery to eventually die. The NightStar really does only need 25 seconds of shaking for 20 minutes of light, but it is best as a backup light, not as the primary flashlight because we all want a brighter flashlight with a simple on/off switch for our normal use, as long as we have batteries.
http://www.appliedinnotech.com/
From this day on, never buy anything but an LED flashlight, the LED (the bulb), never burns out, it never breaks, and it extends the life of batteries by several times over.
Here is a description of a $15.00 LED key chain flashlight that I recommend to friends, the battery is regulated so that for the first 11 hours the brightness stays exactly the same, and then that is followed by 10 more hours of slowly declining brightness as the battery drains, in a normal flashlight batteries only last about 1-1/2 hours to two hours and they start dimming from the first time that it is switched on.
Features
Uses a Nichia white GS LED with a life of 100,000 hours
Constant brightness: 10 Lumens
Uses one 1.5V AAA ( Alkaline, Ni-MH, Lithium ) battery, inexpensive and widely available
7.1cm (Length) x 1.4cm (Diameter)
21-hour working time ( 11-hour sun mode plus 10-hour moon mode)
Made of aircraft-grade aluminum
Durable Type III hard anodized finish
14-gram weight (excluding batteries)
Waterproof to IPX-8 Standard
Reliable twist switch
Capable of standing up securely on a flat surface to serve as a candle
https://www.fenix-store.com/product_info.php?cPath=22&products_id=435
The thing to remember is that the old fashioned, breakable, and battery draining flashlight bulb has been tossed onto the trash heap of history, although some companies are still selling them to the uninformed public, the LED has replaced it.
I meant to mention that Coast flashlights is giving one away for free if you pay the $3.50 shipping.
I did it and got a nice little $10.00, LED flashlight with an 18 hour battery life (AAA battery).
http://www.coastportland.com/surveyCCpp.php
This is great information. Thank you so much!