I integrated Z-wave light switches into my homekit setup. I added z-wave relays behind many of my regular light switches, replaced some switches with z-wave dimmers, and the rest of my lights are Philips Hue. If you know basic linux commands you can use a Raspberry Pi to serve a Z-wave hub's devices to HomeKit. I use homebridge-wink but there is also homebridge-smartthings. It works surprisingly well.