Here's a short video so you can see how it looks. It is more noticeable in person, but you should get the general idea.
***UPDATE 5/4/10: If you make your own star in a jar and post it in the comments, I'll send you a patch!***
Step 1: Gather Your Materials
Solar garden light
LED candle (see notes on step 4)
Star shaped LED Christmas lights (or make your own shape)
Glass jar with a wide lid (this jar is from some marshmallow fluff)
Tin foil (not required, but looks nice)
Tools you will need:
Needle nosed pliers
Hot glue and glue gun
Epoxy (E6000 is the best!)
Solder and soldering iron
Small flathead screwdriver
Step 2: Prepare the Garden Light
First, you'll want to get rid of everything but the top of the light, where the circuit lives. Some brands are easier to get to than others, you may need a screwdriver or a box knife, or even a dremel tool at this point to get it out.
The really important part here is to make sure you don't damage the circuitboard, the wires, or the solar panel. Also, make sure to keep the battery holder intact.
Once everything is out and ready, set it aside. We'll come back to it in a moment.
Step 3: Prepare the Lid
I like to use a dab of hot glue to hold things in place while I work. The hot glue isn't a permanent thing though, as it is very temperature sensitive. Once everything is in place, use your epoxy to make things permanent, especially the holes you made in the lid! That will keep the water out if you use this outdoors.
There are more detailed, step by step instructions in the image notes below.
Step 4: Prepare the LED Candle
I had to try four different brands of LED candle before I found one with a flicker circuit (if anyone knows how to make one of these without all that tedious mucking about with IC chips, I would dearly like to know) at my local grocery outlet.
Pry it all apart with a screwdriver, remove the circuit board, and extract the old LED.
Step 5: Prepare the Star LED
Fold down the wires, and just pull the LED right out. Since the LED came apart from the star, I put a dab of hot glue in the hole and shoved the LED back in.
Step 6: Put the Star in the Flicker Circuit
Heat up the solder on the tabs of the flicker circuit, and insert your LED. Add a little more solder just to make sure everything stays in place, but don't connect any of the four tabs to each other (except the positive wire to the positive LED lead, it's supposed to be like that).
Step 7: Attach the Flicker Circuit to the Garden Light
Once it's all attached, put a battery in and see if it works right. If it does, pull out the hot glue and tack everything together (see the third picture below). Once that's dry, put epoxy on all the major joints and let it dry overnight.
Step 8: Tin Foil, Part One
Make sure you leave a way to get back to the battery holder. I didn't, and when I went to put the nimh battery back in (I was using an alkaline for testing) I ended up having to pull off all the tin foil.
Step 9: Tin Foil, Part Two
However, if you are lazy and absentminded like I am, you may either forget or decide not to flip it back over in the morning so the battery charges. If you crumple up a bit of foil and put it at the bottom of the jar, it reflects the light nicely, and is a simple alternative to flipping the jar over every day.
Step 10: All Finished!
I hope you've enjoyed this instructable and found it useful. As always, please leave a rating or a comment or both. Let me know what you think of the idea, the instructable, my writing style, etc. If you need any clarification or help, just ask!
Also, if you make this instructable, post a picture in the comments and I'll send you a DIY patch!