Beware: the bridge for Milight bulbs also communicates outbound to a mystery server for Internet control of the bulbs. The actual RF protocol has been documented and implemented as Arduino code, though, which is what I use for my installation.
Having a separate wifi network (and separate VLAN for wired) IoT devices sounds like a good idea, and is something that I'll be doing this weekend...
(Also will port-scan the MiLight bridge to see if it's got any other interesting services on it)
You can also remove the wifi part, and communicate with the bridge via serial:
https://servernetworktech.com/2014/09/limitlessled-wifi-brid...