Smart lamps often function on their own rather than connecting directly to one another, but you can control multiple lamps if you integrate them into a certain hub or smart platform. Philips Hue lamps, for example, are designed to work seamlessly with each other and any Philips Hue lights if you connect them with a Hue Bridge. Having multiple lamps synced to a virtual assistant like Alexa can also let you set routines to control them all together.