it's 1:30AM and i was just running over this and a few other threads and it struck me that you can't warm you hands or take the chill out of a shelter with a LED,you could hold that bulb under a tin of beans all nite all it would do would be to help you read the label.i was over at the Antique Radio site a bit ago and a guy posted a thread about finding a very old shortwave radio under the floor of a old shack wrapped in a seal skin.he assumed it was part of a survival stash because along with it he found ship biscuits,matches in a bottle and..candles-