Question about Ubiquiti Us-24-250w

I have a USG and a switch in use. However, I have not yet used an SFP cable, as 1Gbps LAN is quite sufficient.

The SFP port of the Security Gateway Pro is on the WAN side. The LAN side has only one RJ45 port. So the question makes no sense.

I do not have a security gateway in use, but 2 US-24 switches and 3 APs. They are all connected with normal Cat 6/7 network cables. SFP is mainly needed when the speed of the normal ports is no longer sufficient.

The SFP's (the US-24-250W has 2 of them) are needed if you want to connect several switches.
There are a few details on the official site:
https://dl.ubnt.com/datasheets...