Every time I use LED lights, I'm pretty amazed. Use the torch app on a mobile phone on a really dark path - it seems ridiculously bright for such a tiny source. Put a bulb in a lamp and leave it on overnight - it's still just a little bit warm to the touch in the morning. Take a modern torch using 3 or 4 LEDs - impressively brilliant beam with quite long battery life.
It bothers me a little that, like the computing power and location finding utility in a mobile phone costing even only one or two hundred bucks, LEDs are a technological marvel that people just instantly get used to without thinking about the stunning results science and engineering have delivered literally into their hands.
Think about your LEDs when you use them, and encourage your children to do so, too. And get unimpressed responses from them if they are teenagers. But you have to try...
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