Here is one for your emergency supplies, as well as your prepper stock. When power goes out short term, you still need light. Battery powered lights will fill the gap, but sometimes power is down for a week at a time, and then you need this instead.
A lantern room lighting system that will allow the user to recharge the internal battery from a hand turned internal generator. This covers both sides of the simple power failure, and a SHTF scenario.
Pardon the picture, the camera didn't like the light 
coming from the lantern.