Alpinebear offers a White LED Light puller and it glows when you press the button from the middle, it is a high quality LED light puller which comes in packging of one piece. Can be attached to jacket, backpack or any place where you need a bit of light for exploring in dark.
 
Light has 3 modes first is simple, second is normal strobe and third mode is fast strobe mode. Batteries are pre-installed and you don't need to buy separately.