I have never used any power conditioning just good quality multi IEC outputs and never had many problems. However in the last 6 months light bulbs have been blowing like crazy in the studio, it certainly shows that there is a problem with the incoming mains and I dread to think what it is doing to my equipment and the sound. I have read a little on the subject and have heard that the 4/6 way power strips with surge protection can affect transients and such like in your music as can UPS systems. What do the World class facilities use to clean up their power? What are the things to look for?