Here is a news article on Cambridge's new glow in the dark path way. It is used in Christ's Pieces.
Press release is at end of this post, indicating the glowing surface technology is patented.
It is claimed to be the first ultraviolet powered path, but has anyone seen it work?
Here is the manufacturer's web site, Pro-Teq.
Here is the video from the Daily Telegraph.
click to enlarge.
The patent referenced on the web page in the bottom left corner is: GB2472474 as here. (Depending on your browser font size, this patent can be hidden in error.)
The patent documents and history are here. I read the patent and could not find any method described or claims to creating the glowing path.
image from Pro Teq
You can see that the image above shows a picture of a moving cycle lamp, taken over several seconds. This very long exposure allows the ultraviolet particles to be visible in dim light - to a camera. Five trusted people I know have looked at the path in the dark, seen darkness and wondered if it worked.
Natural minerals that glow blue in the dark include fluorite and others as here.
from stuff.co..nz - click link for more
I communicated with the inventor, Hamish Scott, this morning and there is apparently now no patent with respect to the glowing path, (contrary to press release below) but just photo luminescent particles, a natural earth product, sprayed on the path. The ultraviolet is absorbed in the day and emitted in the dark. A very impressive design.
I am waiting to hear what the actual substance is as we need some in our street being pitch black in our corner at night!
Starpath costs about £75 a square metre to apply. 150 square metres were covered in total in Christ's Pieces giving a total cost estimate of £11,250.
Starpath is similar to COREglow here. COREglow can also be provided as photoluminescent aggregate set in tarmac and glow for hours.
path image from Core GlowWe can go to Amazon UK and buy these Coreglow glowing rocks.
image from Amazon
I will update my blog when more details revealed from Pro Teq. Update, no replies from Proteq as of 1/11/2013.