[incompatible]

Nice, but:

"Since the device is a light bulb, it would be difficult to detect and likely to go unnoticed."

I doubt it would be any harder to shut down than any other public-access WiFi device, just a bit of experimentation with turning off power / devices would find it.

[jagged-chisel]

New device design: battery backup for the computer, light still operates based on external power.