A remnant of the autonomous AI fleets developed by the TriTachyon Corporation. Illegal under Domain (and Hegemony) law, and an abomination to the Church of Galactic Redemption, the First AI War saw these creations purged from the Sector. At least that is how the official histories tell it.
The Lumen is a fast, multi-purpose frigate best suited to harassment of opposing targets using whichever of its many tools is more appropriate. The Lumen's AI core was noted for its ability to create a debilitating frustration effect in human captains beyond what its combat specifications would suggest possible.