Seriously the BEST purchase. They could not have been easier to install! The mounting ring that you screw into the socket fit perfectly, the light just twists into that, and it is done. You just click the little switch on the top for what temperature of light you want, so you can have cool, medium , or warm light, and it was so so easy. Seriously just one switch, and they probably took five minutes apiece to install. The best purchase!