How about buying already built flashlights?

I need that for my bicycle.

I need 12 for my truck.

xkcd?

He must be popular with the neighbors.

Now he just needs to make a red one. Because red doesn't ruin your night vision, right?

I'd also like to see the perspective of it shining from a mile away. Could you pick it out in a distant cityscape?

That's very interesting for movies, I think. This shit runs with batteries and weights just a few pounds. Just think of the applications regarding lighting movie sets, especially outdoors at night. Could be a big cost and time saver.

Forget the neighbours, he was really close to that highway.

That thing could summon Batman

Fire In The Sky has been added as a related post - related requested by RFlagg on that post.