You could do that. But from memory, and it's been a while, bulbs do not repeat well, so keeping them away from your HE zigbee mesh is preferential.
I think you'll find the best way to integrate Philips Hue into Hubitat is via the Hue Bridge. It's the recommended method. Also, flakey internet will not stop the connection between Hue Bridge and HE, as it's all inside your network. If you mean your local network goes down, well, that's something you will need to fix. It sounds like you will need to fix your local network wifi connection.
