I have a strange problem with this. I installed 4 in one lamp. I could get 3/4 in a pair just fine. Since the last one didn't connect, I tried removing 3 workers and only installing the remaining one. I was able to get it to work, plugged the other three back in and now the other bulb didn't work. In the app it showed as "offline" no matter how long I waited. I repeated this cycle several times with different bulb combinations. For some reason I can make all 4 lightbulbs appear in my app, but one of them is always "offline". There are no broken lightbulbs, they just don't all work at the same time. I'll be returning them as there's no point in having smart bulbs when I can control three, but I need to use a switch for the last one. Unfortunately because they had the best value for money.
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