Wifi環境が変わったあとのLifx LEDの再設定方法について紹介します。

How do I move my lights to a new network? – LIFX Help Center

If you’ve changed your Wi-Fi password, or setup a new router with a new password, there is only one way to reconnect the lights to the network.

You need to hardware reset them, and reconnect them, just as you did the first time.
https://support.lifx.com/hc/en-us/articles/200468240

Schedules and scenes will still work with the lights once reconnected. If you use the same light names, all other integrations should work as expected as well.

Hardware Resetting your LIFX – LIFX Help Center

Turning your light off/on 5x slowly at the switch will reset the lights – they will color cycle or white cycle and stop on white.

5回電球の明かりの電源をオン・オフを繰り返し、設定のリセットをする。
アプリから再接続するわけだが、ライトの名前は同じものにしておくとインテグレーション的に都合がよいのでおすすめである。