At first I thought this was a futuristic-style doorway illuminated by LED as a visual indicator for an entrance/exit. But upon closer inspection of the photos (and description) from this IKEA Hackers project, the light-framed passageway revealed itself to be a dramatic reflection of style...
Jussi of Finland describes additional touches made to his LED powered customization:
To get some cool vibes out of my Hovet mirror placed at the very end of a narrow hallway, I decided to play a little bit with LED lightning.
To boost the effect of the ambient light, I painted the wall with a structure paint, so that the surface becomes slightly three-dimensional. For some extra comfort, I also attached a remote controlled power switch behind the mirror.
An IKEA HOVET
mirror will set you back $129.00 (here it is just leaning against a wall
for reference and in daylight), but this project should work with a variety of similar mirrors, even those cheap-o cardboard backed models available at Target or KMart (with additional spacing between the mirror and the wall). Here's a more traditional and subtle LED+mirror project
from Instructables for reference for how to modify a mirror for LED backlighting: