I have three Sylvania Smart+ Model 75696 bulbs on a single switch. These are zigbee bulbs, not bluetooth or wifi. Until earlier in August, these bulbs worked flawlessly. Two weeks ago, that changed.
The bulbs just go dark. SmartThings app shows them as “on” at full brightness. But, they appear off.
I have removed and re-added them from SmartThings many times. I have turned the switch off to reset them after removing them from SmartThings before adding them back a number of times. I have even left them out of the fixtures for a period of time hoping there might be a hard reset.
The only change that occurred in my house around the time this issue cropped up is that I allowed Vivint to add some devices to my house. That included their hub, door bell, thermostat, smoke detector, glass breaking monitors, door sensors and leak detector. Those devices were removed earlier this week but my issue still remains.
I cannot find a way to update the firmware.
Has anyone experienced anything similar or have ideas on what I can do to resolve the issue?