Probably the easiest way to facilitate this would be to buy, or steal, one of those solar yard lights. A picture of one of these artifacts is attached. Regarding stealing them, that's the crazy part. Often these things are just stuck in the dirt, in somebody's front yard, not difficult to remove. They're easy to find in the dark too! ;-) Anyway, I'm just trying to make things easy for you. Your spec did not mention how powerful of a flashlight you wanted, how long the light should last, or the method for recharging, etc.