With the advent of miniaturized technology through the day, it is perfectly logical that even everyday objects like a pen is no longer as this case – remain the single icon ThinkGeek Pen Light LED. Retail $ 24.99, this unique device is a dual-LED output pin, an integrated pocket clip helps you keep on hand at all times. After all, you never know when is the next voltage drop that could happen, and should that may occur, you always press the tail switch between high and low beams, the toggle is estimated at 16 lumens and two lumens and not only that, It even works if you are all wet because it is sealed for water resistance up to 1 meter for 30 minutes. A pair of included AAA batteries should give about 75 hours running time.