Picture of Firefly Jar!

Its cheap and easy!

Make your weekend useful by decorating your garden with as many jars of fire flies hanging from the trees! It takes less than 10 mins to make one of these. So try it out!

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Step 1: What you need!

Picture of What you need!
  • Any colour festival led lights will do! (its all right if some leds don't work)
  • A large plastic jar (mine is a bit small but don't use glass!)
  • A drilling machine or a screwdriver
  • Electrical tape
  • Scissors
  • Strong string
  • Hot glue or epoxy or you could try using some other glue if you know it will work.
  • And a little skills! :)

Step 2: Making a hole for the power wire!

Picture of Making a hole for the power wire!

For this step I first marked the center and then used a drilling machine to drill a hole. For those who don't have a drilling machine you could heat the screwdriver and melt the plastic to form a hole!

Note: In this step I haven't made holes on the walls of the jar, but I suggest you to make a few holes that act like vents to the lights and cool them down.

Step 3: Cuting the power wire

Picture of Cuting the power wire

Cut the power wire. Don't cut the wire too close to the bulb or the plug.

Step 4: Filling up the jar with fireflies!

Picture of Filling up the jar with fireflies!
  • Pass the cut end of the wire through the holes made in the lid. Then randomly start filling the jar with the bulbs!
  • Tie the string to the nut with a couple of knots. Pass the other end of the string through the same hole. Now close the lid, make sure that you don't squeeze any wires between the lid and the jar.
  • Pull the wire and thread. Take your Hot glue or Epoxy glue or any glue you think which will work to seal the gap. And not let the fireflies escape! :D (It is for not letting insects or water collecting in your jar).
  • Now only the connections are left to be completed!! Yay!!

This is great.I brought the wire over to the outdoor plug and wired the flashing unit inline and with it your firefly PLUSE and blink and do all sorts of things. I have a controller that will plluse to music. Now when the two feet of snow melts and the temp vets above zero I will be ready to go with one on each side of the porch.

pawanvs99 (author)  Danieldabear1 year ago

That's awesome!

Post a picture of that when you use it :)

What makes it Firefly-like? Where I live the fireflies glow in a pulsating pattern. The lights you show would just come on and stahy on, or am I misunderstanding something??

pawanvs99 (author)  dougstrickland1 year ago

Nope you haven't misunderstood any thing! Its your choice what type of led lights you use. You could use Christmas pulsating led lights to make them look realistic. But I haven't used them in my Instructable to keep costs minimal, cheap and easy for others!

If you are using the pulsating led lights then you should always keep the little control box inside NOT outside the jar (due to water the risk of electric shock is much more).

If you want it to look more realistic then go for the pulsating one!

xaenon1 year ago

One suggestion I would make: If this is going to be left hanging outdoors, you might want to seal up the hole in the lid with caulk, epoxy, or hot glue to keep water (or even insects) from collecting in the jar. Heat should not be a significant issue if you're using LEDs.

pawanvs99 (author)  xaenon1 year ago


Why shouldn't you use a glass jar?
pawanvs99 (author)  nathan nash1 year ago

I said that because glass is heavy and plastic is light. You could if it has a plastic top or if you are going to hang it on a thick and strong branch.

But the one which I made is cheap, glass may be a bit more expensive. If you try it let me know how it worked out for you.

If you were to recycle a glass jam jar then it wouldn't cost you anything and glass isn't that much heavier than plastic, the only problem would be if you dropped it and it smashed. Cool project and if i do make one i will post a picture.