If you encounter an error message saying “Uncertified Accessory”, please follow the instructions below to pair your light to HomeKit:
1) Set the light up using the LIFX app. When prompted, choose "LIFX Setup"
2) Once the light is set up to the network, either a) open the Apple Home app and scan the provided QR code or enter the 8-digit HomeKit code; or b) tap on the "Welcome to HomeKit" option in the LIFX app to complete pairing. If the "uncertified accessory" message appears, click "Add Anyway" to proceed.