I'm not sure how it happened, but a few of my lights have had their clock fall out of sync. One comes on an hour before scheduled, another comes on around 15 minutes early I think? I haven't been able to find any way to actually address this outside of resetting the lights to factory default and re-adding them to the room, which is kind of a pain sometimes. It would be handy, I think, to have an option to manually resync the clocks of the lights. Potentially even have this automatically fire every now and again to make certain the internal clock in the lights is set correctly.