Introduction: Firefly Jar - Christmas Tree V.1.0

Picture of Firefly Jar - Christmas Tree V.1.0

The Christmas season just begin! If you don't have a tree or space for it, I'll show something that would match your desire.

There are two - major - magic things in the world - Christmas tree (with fairy lights) and fireflies, so why not put all together?

I uploaded a video that shows you some blinking modes of the fairy lights: two of them matches better the proposal.

Step 1: Materials

Picture of Materials
  • Fairy lights (mini lamps, type "rice") [R$ 9];
  • Dark bottle/jar (glass) - approx. 1L volume;


  • Diamond bits;
  • Drill machine/rotary tool;
  • Insulate tape;
  • Protection glasses and gloves;


  • Incandescent lights: If you are using incandescent fairy lights, you must keep the temperature low inside the bottle or reduce the power by changing the blinking mode - I'll explain more in the next steps. If you use LEDs instead, may you don't need worry. I don't like LEDs because they are directional and they don't have those amazing-warm-yellow color.
  • Dark bottle/jar: It's nice to use a dark one because they hidden the wires, so you (almost) just see the lights. I've used a green one to be similar to a tree, including its format - that one was from grape juice.


A good ventilation needs to be provided to keep it safe. Do not use plastic bottles/jars. Do not keep permanently the lights ON, especially when you live home. Finally, I'm not responsible for any damage that would cause you.

Step 2: Drilling the Hole

Picture of Drilling the Hole

If you don't want to keep the wires out from the neck of the bottle, you can make a hole in the bottom. For that, you need to use a rotary tool or drilling machine with a diamond bit (rounded is better). Use water to lubricate and to not allow the bits to get warm.

Be careful using electric tools and water, and including to that, use protection gloves and glasses.

To remove the label from the bottle, keep it for some minutes in hot water. This will help you to remove easily.

If you are thinking of keep the lid, please make holes in it too.

Step 3: Wiring

Picture of Wiring

LIke I said, if you are using the incandescent lamps, you need to try some blinking modes to make sure the wires inside the bottle not get too warm.

In my case just two modes cause some excess in warm, when almost the the time the lamps stay ON. In the other cases the temperature is almost the ambiance.

In the hole that you've made you will pass the power wire, or the wires from the lamps. I prefer mark all the five wires, cut them and then re-assembly. I keep the control box outside. You also could pass another wire or cut the plug and then pass through the hole.

Now you just put the lights into the bottle. Sometimes you need to shake it a bit, but be careful with the lamps.

TIP: You could use a 220V fairly lights in 110V, may help.

Step 4: Test and Enjoy!

Picture of Test and Enjoy!

Try some blinking modes that are better for your case. Watch the video with some modes!

Merry Christmas to all of you!


CherylZT made it! (author)2015-12-15

I made this 2 Christmas' ago. My brother was visiting from oversees and we had a bottle of Vodka he brought us. After it was gone, we added the blue light strand inside, trimmed the cork top for the cord and its still sitting on our bar. We decorate Christmas with blue lights, silver and white splashes. Easy and pretty for any room.

dpizetta (author)CherylZT2015-12-15

Oh, very nice. Easy and pretty as you said. Thanks for sharing with us :) Blue lights in this case remembers me the alcohol color inside the Vodka's bottle :)

satoko68 (author)2014-12-05

We don't do Christmas, mainly because we can't be bothered, but this idea has a lot of potential for alternative room lighting that would be really relaxing. Thanks for sharing :-)

dpizetta (author)satoko682014-12-07

Thanks! Share your result :) If you google about this, you would find some nice ideas :)

dpizetta (author)2014-12-03

Thanks peppypickle! Share pictures if you build one!

peppypickle (author)2014-12-03

super clever, thank you for sharing! I'm going to try and make this soon!

peppypickle (author)2014-12-03

super clever, thank you for sharing! I'm going to try and make this soon!

About This Instructable




Bio: I'm a Computational Physicist at University of Sao Paulo in Brazil. My hobbies vary among music, electronics and drawing. Black Lead (draw): www.wix ... More »
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