Light Emission Diodes – LEDs, are small electronic devices capable of emitting light, like lamps. They were created by the recent spacial industry by the end of the 50s, and today they represent what is the more advanced in lighting. They are extremelly economic and lasting, and its light is pure with a single color, for each LED. LEDs ca have different colors (ie. red, green or blue) and an electric control system can obtain any color composition, what allows for a wide and diverse range of possible applications in architecture and other activities.