How many Rivers of Light are there, and where do they go?

Hint 1 of 6:

A River of Light near the oxygen generator on Level 2 - Administration
connects to the Mining Claims Level A tunnel.

Hint 2 of 6:

A River of Light in Mining Claims Level D connects to the Center Pit Staging
Area.

Hint 3 of 6:

A River of Light in the New Excavations test tunnel in the Center Pit Staging
Area Lower Level connects to the Ore Processing Center.

Hint 4 of 6:

A River of Light in the cavern at the end of the Cepheid Tunnel (underneath
the Abandoned Tunnel) connects to the Cepheid Road.