I believe that would require a Wi-Fi connection, because Automations run from Wyze servers.
It won’t, at least not in the test I just did.
I enabled the mobile hotspot on my phone and connected a spare Cam OG to that. In the Cam’s Settings ➜ Spotlight, I selected Auto, enabled both Turn on when conditions, and set Timer to 15 s. I could walk into the darkened room where I placed the camera and trigger the spotlight reliably while it was connected to the hotspot’s Wi-Fi. There was no cooldown, but the Cam OG was automatically added to my current Cam Unlimited subscription during setup, and I don’t think there’s a way to opt individual cameras out of that. (I didn’t create a secondary Wyze account to see about setting the Cam up in an unsubscribed state, but I wouldn’t expect a better result if I did that.)
When I turned off the hotspot—I confirmed with the Wyze app on another phone that the Cam OG was unreachable—and walked into the room, there was no spotlight activation even when I moved closer to the camera and made exaggerated movements laterally across the field of view to try to trigger it. Nothing. Bupkis.
When I turned the hotspot back on and walked into the room again, the spotlight activated as before. I think this pretty convincingly demonstrates that a Wi-Fi connection is required for spotlight activation.
That’s the best answer I have so far, @MrT. It’s not what you wanted, but I think the test was fair and generated an accurate result. I wasn’t really sure what to expect, because I thought the camera might do pixel differentiation within the device itself, but with Cam OG being the “budget” line for Wyze, I think that’s asking a lot. Now I’m curious about what would happen if I did the same test with a Cam v4…. 