Hi guys. i'm looking for data indicating that yields went up after switching from standard to electronic ballasts. I've heard guys say that the 600's are performing like 1000 (standard ballast) but I haven't seen any objective data to support it. I'm thinking about buying another ballast and if electronic doesn't perform better then why spend double the money(what I can get a cheepo standard one for). Once again guys, I'm interested in lumen or usable light, not rf interference debates or cost debates. If they work, I'll buy one.