Red series switch (LZW30-SN) or Red series dimmer ( (LZW31-SN)?
You need a zwave stick and install the zwaveJS integration and add-on. How you do that depends on how you run HA. Once it is installed, you add the dimmer and then you can access it in HA. You need to set it to smart bulb mode so that it keeps the load turned on all the time. For basic operation, you can look when the level of the switch changes and match the bulbs to it. Something like this post.