1) Bringing or providing light 2) Giving light 
light-bringing; light-giving
• (a.) Giving light; affording light or means of discovery.
Lu·cif'er·ous adjective [ See Lucifer .] Giving light; affording light or means of discovery. Boyle. 
luciferous, luciferousness 1. Light-producing; bioluminescent. 2. That which brings, conveys, or emits light. 3. Affording illumination or insight; luminous, illuminating. 4. Bringing or emitting light.
bringing or providing light. · providing insight or enlightenment.