Check out this great RBG LED geodesic dome project shared on the Adafruit Forums by community member J4mes:
It only took me 3 weeks of soldering every spare moment I had, but I was able to extend 46 Flat RGB LED Pixels from 3.5in apart to 4ft apart.
Now my only problem is that my soldering skills were rudimentary when I started, as I got better as I progressed, so there are a bunch of weak or compromised connections. Last night I cut out 4 of the pixels because I had to twist the wires just so to get the connection to run cleanly through.
I will be traveling with this installation quite a bit and need LEDs that are going to last and put up with the elements.