How can I have local AND imported scenes? (LIFX)

Please post the error message.

Most likely you just need to adjust your configuration.yaml scene !include(s)

configuration.yaml

scene ui: !include scenes.yaml # UI generated

scene lifx: !include lifx_scenes.yaml

Put your lifx cloud config in the second file lifx_scenes.yaml (after you create it).

Also please format your forum posts correctly. See: https://community.home-assistant.io/t/how-to-help-us-help-you-or-how-to-ask-a-good-question/114371#oneone-format-it-properly-16