I've been playing Fallout 3 since it debuted but have never found the the flashlight hotkey; I'm completley amazed that the game guides tantalize the reader by discussing how useful the flashlight is for finding loot, but never tell the reader where it is on the keyboard. I appreciate a short answer - Noob cracks are also welcome LOL

Pip-Boy key, hold it down an extra second or two and the Pip-Boy light comes on. Same to turn it off again.