Fluorescent dimming whats the best method 2-wire phase angle I have heard while the most cost effecitve has higher harmonics and low end dimming, and staibility flicker issues, 3-wire (dimmed hot) only made by lutron, advantage / disantavage?? 0-10v best option for fluorescent low harmonics throught the diming range, cost effective etc. what are some other major advantages disadvantges to each system??? no dali...