Per the Photonix Core Wiki says , it says
… it is one of several technologies available only for pre-ordered players.
The Photonix Core was not mentioned as a bonus during the pre-order state. With that said, what are all of the pre-order specific technologies in No Man's Sky?
Best Answer
From here, the exclusive items appear to be:
GameStop (physical, PS4):
Steam / GOG / Humble Store (digital, PC):
Limited edition PS4 version: