Groom shader light interaction

I was getting some trouble with light on a groom asset. I can´t set a dark color
Without rough it turns pale and when I increase it I get this sort of specular with every light, even if the light intensity is low. I’ve tried modifying the tangent color but I cant get rid of this specular. The other issue is about the hair shadow, it doesn’t look very well, is there an attribute apart from the groom attribute?

this is the shadow behavior

Hi, you can find answers here - Unreal Engine: Alembic Hair/Groom Plugin. Official Q&A. Part 3 - YouTube and in the previous parts =)