How to Make Glow Jars

They're wonderful decorative items and I just thought, couldn't they be a nice solution to replace nightlights? Or just brighten up dark rooms? This will also reduce the use of electricity to power residential lighting and it might help out in rural areas.

http://www.wikihow.com/Make-Glow-Jars

Highlighter ink jar

1. Cut open a highlighter with care. Remove the felt stick (ink cartridge) located inside the highlighter. It's recommended that you wear disposable gloves when handling everything, to avoid staining your skin. Also, place something over your workspace to prevent staining (this tutorial shows a piece of unwanted carpet off-cut placed over the work surface.)
2. Put the highlighter ink cartridge in the jar. You only need one cartridge per jar.
3. Fill the jar with plain water.
4. Mix the liquid around a bit. Then, let it sit for a day to achieve the best effects.
5. The following day, take out the highlighter cartridge. You should find the result is one cool looking jar. To use, place under black light and you'll get a great glow for parties, trick and treating or stage props.

Poster paint jar

1. Instead of highlighter fluid, you can also try a bit of poster paint in fluorescent colors. With most brands, this will turn out fabulously. Just add enough paint to color the water, and mix well.
2. To make it glow, try using purpose-made poster paint. Glow-in-the-dark poster paint is readily available almost anywhere, and will make your jars glow in the dark for up to a quarter of an hour after turning out the lights.