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Smart lamps as usually lamps which are controlled via an app or wirelessly with a remote or other control. There are many competing technologies. Most involve bluetooth, some are wireless, some requirer a hub. Some are compattible with Alexa, Google Home or Apple Home.
The main manufacturers peridiocally make "Smart Lamps" and then withdraw for a while. I expect that as a technology becomes dominant the numbers of products available will grow. At the moment the market is quite fragmented and so there are different competing systems.