Description
This mod was made by request.
Here's what I did: The Nightingale armor still is light armor and I did not change anything about it.
I Creadted a new armor that's called "Markarth Armor". It can be crafted at any forge with the "Daedric Smithing" perk.
The Markarth Armor is a Heavy Armor with the enchantments of the Nightingale Armor AND the stats of a Daedric armor.
There is an option to download a version without the enchantments if you want.

 
 
 
Requirements
None.
 
 
 
Compatibility
Basically with everything. 
 
 
Installtion + Unistalltion
Use the mod manager and everything should be fine.