I discovered the "Photonix Core" in No Man's Sky and for the most part it appears to be the third and final tier (essentially Theta level) of the technology.
Per the Photonix Core wiki, it is describes it as
Photonix Core is the third upgrade available for the Pulse Engine.
However doing some more digging, the Pulse Engine page is telling different story on it's tier level
- Pulse Jet Sigma / Photonix Core
- Pulse Jet Tau
The Photonix Core is shown on the same level as Pulse Jet Sigma and both require the same materials to install the technology; being 100 Chrysonite, 200 Iron, & 50 Zinc
As the Photonix Core and Pulse Jet Sigma appear to be equal, how effective will the Photonix Core be in addition to the other engines?