On Tue, 08 Jan 2013 21:36:04 +0000, Graham.
wrote:

I saw these in a new Sainsbury's store.

http://www.flickr.com/photos/g3zvt/8...ream/lightbox/

Are they LED arrays?

Could be the same principle as edge-lit LED backlights on monitors.
Stripping a couple revealed a thick perspex panel that was dimpled
like buggery at a dimple/dot pitch of 1mm. In these ones the edge
lights were CCFls but the same idea would work with LEDs.
I still have the dimpled sheets, and that gives me an idea for a (now,
not-so) novel light.