This is not a picture of glow in the dark painted pavers. It has been claimed by a photograher who says he used a normal paved walkway , special lighting tricks and photoshop.
Researching I found that the glow in the dark paints such as Rustoleum's are not for exterior use and a whole lot of people have posted on their blogs that it didn't work anyway.
There are a lot of other options listed as glow in the dark pigments, but they are intended for use in small plastic molds, not large surfaces. The same applies to the pictures of the "glow in the dark" planters that are all over Pinterest.
I am still trying to discover something...anything that would actually work. So far this is the best option I have found for DIY. But it uses glass bricks and led lights.
And this looks promising, but I don't know if it is available outside of the UK yet.