250 Quadcopter LED Mounts
Requires moray's 7.3mm frame spacers from here (framespacer v3.stl): http://www.rcgroups.com/forums/showpost.php?p=29918506&postcount=215
These are used with Turnigy LED strips (7.3mm tall), and perfectly fit 6 LED's, with wires soldered behind.
I've used heatshrink where the wires are, just to keep them from banging around during crashes.
Much better than the 3-LED version.
They are spaced so they fit just inside the outside of the arms, so in the event of a crash they should be protected, unless you hit it that hard that you destroy 2 arms in the process :).
I've also uploaded a new version (further in frame version), which puts them 2mm further inside the frame, just so you have even less risk of hitting them in a crash.
I only use them on the rear, so chances of actually smashing them on anything is far less anyway :).