A:AnswerYes they will, but they are smaller in diameter, works fine in recessed can fixture, if you are not bothered about the larger gap between the edge of the fixture and the lamp.
A:AnswerYes and No, they need the bridge to be connected to router but that router does not need to have internet connection. I hope that helps and makes sense
A:AnswerYes. Wi-Fi is not required (not even used). The hub comes with an Ethernet port. You can connect it to any network jack that has internet access. It does not use Wi-Fi.