Some additional alternatives from a company called Orphek. They use emitters exclusively designed for marine aquarium applications (not Cree by the way). They now offer MR16 & PAR lamps suitable for Nano & Pico systems. Again, no soldering required. Use 1 or 2 watt emitters, lower power than the current 3 watt Cree crop. They also run them at slightly less than 100%, less heat, better longevity. More power does not always mean better.
http://orphek.com/wordpress/orphek-p...ico-aquariums/
http://orphek.com/wordpress/pr-25-pe...now-available/