Using a combination of Home Assistant and Amazon Echo I can turn on our tree lights by voice control. The switch is an old X10 unit, but our Dot sees it as a Philips Hue. This does make life easier as you have to climb over the couch to switch them on otherwise.
On a technical note, the switch requires some minimum current to work. LED lights don't use much, but they are plugged into an extension lead with a neon light. That seems to work reliably.