Rasmus Hildonen and Skomakerstuen created a beautiful LED installation at the Horten Lighthouse in Norway.
The installation features over 3,000 WS2812b LEDs in 16 windows. The LEDs react to an ultrasonic distance sensor (HRXL-MaxSonar-WR) under the pier that is used to measure tides and wave heights. A Teensy 3.2 and a OCTO28 Adapter along with the FastLED Library are used to control the LEDs.
This video shows some of the behind the scenes work.