Many functions on Osram's Lightify app will stop working once its cloud servers power down, but you'll still be able to use Lightify devices with a third-party Zigbee hub.
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Osram Lightify Bulb turns on randomly · Issue #210 · dresden-elektronik/deconz-rest-plugin · GitHub
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Osram Lightify Bulb turns on randomly · Issue #210 · dresden-elektronik/deconz-rest-plugin · GitHub