Otoharo!
So many of you do this that I think what I was taught was to use reiki to do what you are using the white light to do. After a full reiki self teratment, then we fill out rooms one by one with our own energy which is now cleansed. So all our space is full of our reiki energy, not simply reiki, but reiki cleansed human energy. Nothing of a negative nature can penetrate that.
finaltiy