Quote:
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?
|
They sell them pretty commonly at camping and fishing supply stores here, under the name of 'Eternal Flashlight' and other similar names.
You should be able to get them online?
They cost about $30 Australian (probably cheaper over the Internet/in the US), but they are worth it.
My only problem with them is that while they are the best in absolute darkness, if there's any amount of ambient light they are not nearly so good. The light seems to have very different qualities than regular incandescent light-bulbs; if I were a physicist, I could probably even tell you why that is.