As long as you live in a submarine, a refrigerator or a steel box, this Striker magnetic LED mine will be extremely useful for odd-angle illumination. If not, not as much. $US9 dudes!
Then again, sink work and car work would probably benefit from a nicely-placed light. Assuming, of course, that it was brighter than you'd assume a lousy $US9 mine light would be. [Striker Hand Tools via Lifehacker via DVICE]