Wonderous lights that also come on in time to Christmas music. Google it and have a look at the photos.
They were originally from a Dad (surname Osbourne) who started decorating his house for his daughter. The collection grew and grew till it was too big and Disney bought them.
They are displayed in the Streets of America part of Hollywood Studios, the whole area is just a mass of colourful lights which are displayed to the sound of festive music and snow fall.