From Lineage 2 Encyclopaedia

Properties

Light Armor Mastery
When equipped with light armor, increases P. Def. by 5.4, Casting Spd. by 91%, Atk. Spd. by 25%, and MP Recovery Bonus by 20%.
Class	Cleric
Type	passive
Attribute	-
Recast time	0 s
Cast time	0 s
Cast range	0
Classes with same skill	Cleric, Bishop, Prophet, Elven Oracle, Elven Elder, Shillien Oracle, Shillien Elder, Cardinal, Hierophant, Evas Saint, Shillien Saint

Skill Upgrade

Lvl. to Learn	Skill Lvl.	Description	MP Consume	HP Consume	SP
20	1	When equipped with light armor, increases P. Def. by 5.4, Casting Spd. by 91%, Atk. Spd. by 25%, and MP Recovery Bonus by 20%.	0	0	4
20	2	When equipped with light armor, increases P. Def. by 6.3, Casting Spd. by 91%, Atk. Spd. by 25%, and MP Recovery Bonus by 20%.	0	0	4
25	3	When equipped with light armor, increases P. Def. by 7.8, Casting Spd. by 91%, Atk. Spd. by 25%, and MP Recovery Bonus by 20%.	0	0	6
25	4	When equipped with light armor, increases P. Def. by 8.8, Casting Spd. by 91%, Atk. Spd. by 25%, and MP Recovery Bonus by 20%.	0	0	6
30	5	When equipped with light armor, increases P. Def. by 10.9, Casting Spd. by 91%, Atk. Spd. by 25%, and MP Recovery Bonus by 20%.	0	0	9
30	6	When equipped with light armor, increases P. Def. by 12.5, Casting Spd. by 91%, Atk. Spd. by 25%, and MP Recovery Bonus by 20%.	0	0	9
35	7	When equipped with light armor, increases P. Def. by 15, Casting Spd. by 91%, Atk. Spd. by 25%, and MP Recovery Bonus by 20%.	0	0	11
35	8	When equipped with light armor, increases P. Def. by 16.9, Casting Spd. by 91%, Atk. Spd. by 25%, and MP Recovery Bonus by 20%.	0	0	11