The Pelican L1. This is probably my favorite little light. Its cheap, simple, tough, effective, and small. One of its most impressive features is the 130 hour run time. That makes it perfect for survival applications. But not quite sure how long the batteries will last in the light if left stagnant in a survival kit though. Its actually pretty damn bright for 9 lumen's, i can light objects at 20 some feet fairly easy. I think it has the perfect amount of light for everyday tasks such as finding you keys or navigating your house at night.