There is a danger in worshipping with the feeling that is created by the mood which is set around the one doing the worshipper. The Holy Spirit does not require a certain setting to work at the full extent of his abilities. If we say that we can get a better experience by setting the mood with the music, lighting, etc. we are deceiving ourselves of how the Spirit actually works in our lives. We do not do anything to cause him to act in us and when we set the mood he does not care that we have tried to do design a place where his work can be accomplished easier. By doing and believing thus we undermine the abilities of God.
Just a good article for more thought on one of the specific ways in which we try to set-up the mood.