It looks like you've selected all "LED 6" lights in your plan, including ones that already have an emissive material. The Adjust Area Light Material dialog will only adjust materials that are already emissive.
You can sort the Adjust Lights dialog by room and select only the LED lights in the kitchen and adjust those. You can also use the Adjust Material Definition tool on one of the bulbs in the kitchen and add emissivity (as long as all the LEDs in the kitchen use the same material).
Brad_M's post in Ceiling lights not showing in 3d as ON was marked as the answer