Sky Lighthouse by Yoshiki.M from japan
designer's own words:
The blue color of sky, the red color of sunset.
This works is the light of sky color.
Learn from a law of the sky , create light of sky color to generate “Rayleigh Scattering” and “Diffuse Sky Radiation”.
It is the color appeared from “natural phenomena” .
– CURIOSITY – The blue color of sky, the red color of sunset. I want to create the color of sky. It is not to paint. It is not to use color illuminant. It is the color appeared from “natural phenomena” . 
– Image of Works – This works is the light of sky color. This light object have beautiful sky color gradient come from a law of the sky. 
– Basic Experiment – Why the sky is blue? Why the sunset is red? Try to generate “Rayleigh Scattering” and “Diffuse Sky Radiation” inside the glass bottle. 
– Prototype for experiment – Blue come from “Rayleigh Scattering”. Red come from “Diffuse Radiation” This light will bring about in us a kind of peacefulness like a clear sky. 
– The Interaction of Light and Colors- The volume and direction of light is changing in response to ambient sounds or as time goes by. It shows us various color gradient like a sky.