I've been using the Envirosphere and an infinite light set to less than 50%.  Transmapped hair looks good, but dynamic hair doesn't. 

And hybrid hair - part transmapped, part dynamic - looks terrible under the envirosphere.  They don't match any more.  The painted part is as vibrant as ever, but the dynamic part looks flat and dull. 

I've been trying to fix this by using brighter lights.  You think I should be using lower light intensity?