Red Hornets

So I got some Red Hornet Zoas at the last fragstock and little by little they have lost their red ring in the middle and the redness at the fringes. I have them low in the tank with moderate current and moderate light although they are under a MH 250W. From those that have them, where do you place them. They obviously don't like where they are and so before I trial and error to much, can you tell me if they like current, light, or shade. thanks