SFS Standard Photon Item 7+

Bulk

A photon crystal increases the flow of photon into your solar manifestations, burning and blinding your foes. While photon attuned, your solar weapon or solar flare deals an extra 1d6 fire damage. On a critical hit while you're photon attuned, the target must succeed at a DC 23 Fortitude save or be blinded for 1 round.

Photon (Commercial) Item 7

Price 3600 credits
Bulk

Photon (Tactical) Item 14

Price 45000 credits
Bulk

The save DC is 31, and the target is blinded for 2 rounds. Damage dealt by your solar weapon or flare while photon attuned ignores the target's resistance to fire.