Luminous Armor, Greater(Book of Exalted Deeds, p. 102)
Level: Sanctified 4,
Casting Time: 1 standard action
Target: One good creature touched
Duration: 1 hour/level (D)
Saving Throw: None
Spell Resistance: Yes (harmless)
This spell functions like luminous armor, except that it imparts the benefits of full plate (+8 armor bonus to AC).
Sacrifice: 1d3 points of Strength damage.