then why is wearwolfs forms armor rating is reflected by your light armor rating?
This is no longer the case
http://www.uesp.net/wiki/Skyrim:Werewolves
Armor rating in Beast Form is affected by their skill level in http://www.uesp.net/wiki/Skyrim:Light_Armor and all five ranks of the Light Armor perk
Agile Defender.
- As of patch 1.3.10, this is no longer true and Beast Form has 0 base armor. This may or may not be intended; it has not been mentioned in the patch notes.
- However, (also as of 1.3.10) you do count as Unarmored for the purposes of the Mage Armor perk.
- If you have http://www.uesp.net/wiki/Skyrim:Dawnguard installed, this is not longer the case and werewolfs do again have armor rating, which however is no longer affected by any perk. The armor rating is 0 at level 1 and then increasing in 50 point intervals every fifth level, beginning at level 11. The maximum rating is 400 at level 46.
So either case, it is no longer affected by light armor