I've played around with setting light specular to black, but came to the decision that specularity level and characteristics are set in the surface shader. Setting light specular to black just removes the possibility of specular highlights from that particular light.

I've since formed the opinion that light specular color should be white and specularity should be controlled with the surface shader. JMO

With EZSkin, something seems to happen sometimes around the center of the scene where parts of the figure will develop a red glow and other parts will pick up a strong blue tint. I've spent hours trying to find where it comes from, but the only cure I've found is to move the figure towards the camera a couple of feet or so. That seems to cover the problem up.