I agree , True no noise nothin nada, very true they are alot cooler, it will definatly drive the bulb better than a magnetic ballast.
most digital ballasts will "chew up" cheap bulbs because they relly push them to the limits. This is why so many HTG problems occur. by the time you get the third cheap upgraded bulb , you have had all this downtime.
Buy quality and lumatek has 3 Years free service !