Do they stack? I wouldn't think so, since LA really isn't armor.
Luminous Armor
(Book of Exalted Deeds)
Abjuration
Level: Sanctified 2,
Components: Sacrifice
Casting Time: 1 standard action
Range: Touch
Target: One good creature touched
Duration: 1 hour/level (D)
Saving Throw: None
Spell Resistance: Yes (harmless)
This spell, favored among eladrins visiting the Material Plane, envelops the target in a protective, shimmering aura of light.
The luminous armor resembles a suit of dazzling full plate, but it is weightless and does not restrict the target's movement or mobility in any way.
In addition to imparting the benefits of a breastplate (+5 armor bonus to AC), the luminous armor has no maximum Dexterity restriction, no armor check penalty, and no chance for arcane spell failure.
Luminous armor sheds light equivalent to a daylight spell and counters darkness spells of 2nd level or lower with which it comes into contact.
In addition, the armor's brightness causes opponents to take a -4 to penalty on melee attacks made against the target.
This penalty stacks with the attack penalty suffered by creatures sensitive to bright light (such as dark elves).
Sacrifice: 1d2 points of Strength damage.
Magic Vestment
(Player's Handbook v.3.5, p. 251)
Transmutation
Level: Artificer 1, Cleric 3, Knight of the Chalice 3, Savant 3 (Divine), Strength 3, War 3, Celestia 3, Halfling 3, Nobility 3, Initiate of tchazzar 3,
Components: V, S, DF,
Casting Time: 1 standard action
Range: Touch
Target: Armor or shield touched
Duration: 1 hour/level
Saving Throw: Will negates (harmless, object)
Spell Resistance: Yes (harmless, object)
You imbue a suit of armor or a shield with an enhancement bonus of +1 per four caster levels (maximum +5 at 20th level). An outfit of regular clothing counts as armor that grants no AC bonus for the purpose of this spell.
Luminous Armor
(Book of Exalted Deeds)
Abjuration
Level: Sanctified 2,
Components: Sacrifice
Casting Time: 1 standard action
Range: Touch
Target: One good creature touched
Duration: 1 hour/level (D)
Saving Throw: None
Spell Resistance: Yes (harmless)
This spell, favored among eladrins visiting the Material Plane, envelops the target in a protective, shimmering aura of light.
The luminous armor resembles a suit of dazzling full plate, but it is weightless and does not restrict the target's movement or mobility in any way.
In addition to imparting the benefits of a breastplate (+5 armor bonus to AC), the luminous armor has no maximum Dexterity restriction, no armor check penalty, and no chance for arcane spell failure.
Luminous armor sheds light equivalent to a daylight spell and counters darkness spells of 2nd level or lower with which it comes into contact.
In addition, the armor's brightness causes opponents to take a -4 to penalty on melee attacks made against the target.
This penalty stacks with the attack penalty suffered by creatures sensitive to bright light (such as dark elves).
Sacrifice: 1d2 points of Strength damage.
Magic Vestment
(Player's Handbook v.3.5, p. 251)
Transmutation
Level: Artificer 1, Cleric 3, Knight of the Chalice 3, Savant 3 (Divine), Strength 3, War 3, Celestia 3, Halfling 3, Nobility 3, Initiate of tchazzar 3,
Components: V, S, DF,
Casting Time: 1 standard action
Range: Touch
Target: Armor or shield touched
Duration: 1 hour/level
Saving Throw: Will negates (harmless, object)
Spell Resistance: Yes (harmless, object)
You imbue a suit of armor or a shield with an enhancement bonus of +1 per four caster levels (maximum +5 at 20th level). An outfit of regular clothing counts as armor that grants no AC bonus for the purpose of this spell.