Bobow, the switch is on the monitor/control panel with the generator switch and the switch that turns on the battery power, etc. I tried to find a photo of the panel on line but couldn't find one at the moment. If I remember correctly (I'm not home right now), the switch doesn't look like it would be a light switch. My RT has the optional armoire, so my control panel is inside the armoire. I think the porch light switch is a rocker switch that will be closest to you on the panel. When I'm home tonight, I can take a look and get a photo.