Why does my normal map makes my color map darker ?

[anonymous_user_8d41d521]

When I apply my normal map ,created inside Mudbox as a displacement map using texturing.xyz, converted as normal map in knald ,exported in EXR and imported into Unreal 4; my mesh get darker (see images below)alt text

[Deathrey (DeathreyCG)]

Use dedicated normal map compression settings for your normal map.