Glow in the dark lightbulbs

A great example of pulling different technologies together for a new product. The question is, why marrying the same properties of the stick-on glow in the dark stars in my child's bedroom (it was a glowing Count Chockula pendant when I was a kid) with coated fluorescent lights hasn't been done before?

I found some pictures of what it looks like with the power down. More light than I would have expected.Article and photos.