That's pretty cool. It's $4.00/ft without the LEDs.
I don't think this is it, but pretty neat just the same.
Tried to find a video and found a post from a year ago with a similar product that appears to have never materialized.
https://pinside.com/pinball/forum/topic/illumicade-to-release-illuminated-t-molding
http://gameroomjunkies.com/index.php/2015/03/31/illuminated-t-molding/