Hubs. Everyone’s got one, and you’ll need one (or twenty) of these things at some point in your home automation ventures. Why? because apparently it’s expensive to build all the compatibility for the newer automation ecosystems like Nest (Google) and Homekit (Apple) into hardware like lightbulbs, and easier to build it into a separate hub, where all of these emerging standards can more easily (and cheaply) be packaged up.
Unfortunately for you, this means if you want to use Phillips Hue, you need their hub. If you want to use Lutron switches, you need their hub. Oh, you want to use GE Link bulbs? Guess what, no worries, they have a hub.