This is way easier than many have thought possible. Limited electrical experience is necessary. The topic of "Ballast Bypass" is confusing to many. Short story: the CFL ballast is a module that converts household power to high voltage to run the CFL bulbs. The LED replacements need normal household power. Thus the ballast needs to be bypassed or simply taken out of the circuit. How to bypass the ballast is a major theme in this youtube video.

Get rid of those terrible 4 Pin CFL lights in your canned lighting fixture. Replace them with LED light trims from Costco for only $13.
In this video we overcome two big issues: 1) How to bypass the built in Ballast device that makes retrofitting 4 Pin CFL fixtures difficult, and 2) How to accomplish the retrofit from below the ceiling -- no need to crawl up into the attic space.

Ballast bypass wiring diagram shown here: http://www.slideshare.net/drcree/4-pi...

Link to Orange connector manufacturer: http://www.idealind.com/ideal-electri...