Wasn't sure where to put this idea.
One of the things we have been doing for a couple of years now, is using simple outdoor solar powered led decorative lights to light the house during power outtages. They are innexpensive, and use a renewable source of energy (sunlight). They are safer than candles or oil lamps.
I will take one apart, keeping just the top for a renewable light in my kit.
Now as far as an idea, I see battery powered led head lamps for sale everywhere. Batteries run out. Why haven't I seen a solar powered one?