As others have said, look for Zigbee devices. I have an Osram SomethingOrOther, that connects to my Hue bridge, which isn't connected to the internet. Philips makes a similar plug.
The fact is that the Hue bridge supports connecting to a cloud for control from anywhere, so they'll advertise that since it's what many people are after. But it works perfectly fine offline, and you can manage it via Home Assistant, for example.
The fact is that the Hue bridge supports connecting to a cloud for control from anywhere, so they'll advertise that since it's what many people are after. But it works perfectly fine offline, and you can manage it via Home Assistant, for example.