^
To add to that...
I have plenty of Z-Wave bulbs. A few of which are outside in coachlights, they are only recommended for interior use. They are about 3 years old and run 365 days a year from dusk to dawn. They are as simple to change as, well, screwing in a lightbulb. What I'm getting at is, they can and do take the place of a dimmer in many situations. If they fail, then so be it, just screw a new on in. They cost about $9 a piece, not much more than current LED lightbulb, and way less expensive than even a non SMART LED comparable switch dimmer. Actually, even less than an incandescent dimmer. The exception is that a wired dimmer can control multiple lights.
For running multiple lights I use a module about the same size as a pack of dental floss and fits inside a regular electrical box. That's pretty much what ARD was referring to, but probably more so the switch type SMART device. My modules are also in their third year, we shall see how long they lasts...