Learn the secrets to making glow-in-the-dark paint. It's so easy and you can save a lot of money.

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[edit] Steps

Obtain glow-in-the-dark powder.
Glow powder comes in different grades ranging from Grade 0 on the high end to Grade 7 on the low end. The main difference between grades is brightness compared to cost. Within each grade, there are various particle sizes available ranging from 8 micron to 60,000 micron. Larger particles are brighter, but also make a rougher paint which can looked speckled.
If you are planning to use a water-based medium, then you will need "coated glow powder" also known as "coated phosphorescent pigment". For solvent or oil-based mediums, you can use standard or uncoated glow powder. A good source for the powder is www.glonation.com. Excellent range of sizes and colors to choose from.
Obtain a paint medium
When choosing a paint medium, look for a paint that is clear, thick, and has no UV filters added. Solvent Based mediums have harmful fumes and are not safe for children and can catch fire. A water based medium is recommended for use indoors, or in children's rooms or with children's crafts. Consider buying a medium that is specifically designed to suspend phosphorescent pigment.
Add 20% by volume of glow powder to paint medium.
Note that while powder is usually sold by the Ounce (weight measure), paint is usually sold by the Fluid Ounce (volume measure). The two measurements do not correlate.
Stir and you're finished.
Depending on your powder/medium combination, your new mix may or may not have shelf life. Therefore only mix what you can use within an hour. MUST BE EXACT!

[edit] Warnings

While glow powders are mostly safe, they can pose inhalation hazards. Also, many mediums have other hazards. Therefore, working with glow paints is not appropriate for projects involving children.