Remember Philips' LivingShapes interactive OLED mirror? those cool and clever €2,490 devices use 64 (8x8) square OLED panels and infrared sensors that detects the outline of the person looking at the mirror and switches off the OLEDs that are in the field of vision - thus turning it into a mirror. Philips just posted this nice photo showing a London Optician that installed three mirrors in one of his showrooms:

The OLED panels are 42x44.2 mm in size, have a color temperature of 3,000K and have a typical luminance of 1,500 cd/m2. The total lumen output when all OLEDs are on is 400 lm.