OK, Sun Jar, but they're frosty blue and look like moonlight.

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I've got the makings for eight for small Christmas gifts. So far, one's complete, all the other glass is frosted and ready post-testing. With the lights I got, I had to break a connection on the wires to get it free, which meant re-gluing since I don't have a soldering iron.

Minor change to the plans; I used a crinkled and then flattened piece of Reynold's wrap on the bottom as a mirror. It gives it a lot of sparkle it didn't have before and brightens the light.

A sample run; the power source here is an old USB cable to test proof of concept (4 volt, extremely stable). Two of the Radio Shack yellow LEDs (1900 mcd, 20 degree beam) are OK if a bit dim, but I can't fit two and the associated diodes. For this, I just used a 47 ohm resistor and wired in series.

I have 19000 mcd yellow LEDs (20 degree beam) on the way, and to run it off a solar cell and 1 rechargeable battery I'm going to need a Joule Thief circuit mated to a battery charger circuit. No big deal; have soldering iron, but don't travel. I'll use the output of the solar cell through a diode to function as the light sensor as well.

My first Joule (pronouned "jewel") Thief. During this season, it leads to a running joke. The battery only has enough power for 1 night, it's currently on its third day. So the occasional comment is, "Look, Ishamel, the LEDs still burn..."

Yeah, the Joule Thief is an inefficient circuit, but it's simple, easy to build and hide in a jar, and lets you run a 2V+ LED off of 1.2 volts from a rechargeable battery for quite some time.