Water Bottle Skylight

About: David is a professional firearm instructor and Emergency Preparedness Author, He has 10 published works and his website is devoted to teaching individuals how to be better prepared for life and life's disast...

Intro: Water Bottle Skylight

I spend a lot of time looking at appropriate technologies coming from missionaries and other groups that work in third world countries. I figure – if it works in areas lacking infrastructure then it will work if we ever lose our infrastructure.

This idea came from a couple of YouTube videos I saw of people making water bottle skylights out of 20oz soda bottles. I modified it slightly and was quite pleased that two of them gave enough light in my cement dome that I can see what I am doing.

Actually, if I am in the general area of one of the lights I can actually read by the light.

This technique was used on my Dome of Doom on Doomsday Preppers and it works very well. I have a series on how I made the dome on my website.

Step 1: Parts

  • 1 clear soda bottle
  • Water
  • Bleach
  • Plastic roof flashing
  • 2 eyebolts
  • Wire
  • Duct tape
  • Mylar space blanket

You can adapt this to what you want and what you are building

Step 2: Instructions

  • Drill two small holes on opposite sides of the plastic flashing, and thread the eyebolts in the holes
  • Fill the bottle with water, leaving enough space that you can add about a ¼ cup of bleach to keep anything from growing in the water.
  • Cut the mylar blanket into a strip approximately 1/3 the height of the bottle.
  • Center the mylar strip in the middle of the bottle and wrap it tightly – you need to leave unwrapped bottle at the top of the bottle to gather light, and at the bottom to release it. – Basically you are making a reflective tube to channel the light.
  • Insert the bottle into the flashing, leaving about 1/3 of the bottle sticking outside the top of the flashing.
  • Wrap wire around one eye bolt, pull the wire tight over the bottom of the bottle, and then secure it to the other eye bolt – this keeps the bottle from dropping out of the flashing.Insert the entire assembly on your roof and calk as needed to prevent leaks.
  • Note: Over time UV light will degrade the plastic – but since soda bottles are everywhere, it is a simple process to rebuild as needed.

Step 3: Video

You can see this come together in this video

Step 4: Dome of Doom Video



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