Sensors, timers, and other tons of non-ip networked solutions exist. I have lights that automatically turn on with bulb sensors and it does not require that they be IP networked with each other. Your red light could be wirelessly triggered on a lamp in another room if you wanted without IP networked devices. Many of the "dumb", working solutions for these problems are cheaper and less complicated than using their networked equivalents.

I have motion sensing, magnetically attached wireless lights that turn on when I go down the stairs. I even have things that can use a single light switch to trigger multiple lamps without rewiring that required zero IP networking.

There are wireless light switches that have no battery because the switch sends a signal using the power from the force exerted on it. There are many types of automation that do not require IP networks.