Disabling a router

I have an Ikea RGB bulb which isn’t always powered on (it’s on a circuit with other lamps). If I add another device when it’s on, quite often the new device will connect to it over any of the dedicated routers, and then when the Ikea lamp is turned off they’re left dangling with no network connection.

Is it possible to disable the router functionality of the Ikea bulb, but retain it as a device?

James