another note- i had three 400 watt magnetic ballasts over the display, and then went to 250's. i think the 250's are plenty for me. meanwhile, i used to have sunlight supply m59s, and had good luck with them, so i chose sunlight supply galaxy electronic ballasts to replace them. this was in feb. of this year. one already quit on me.
they have a 3 year warranty, but how good is a warranty, if you have to ship them in for service every few months?
lucky i saved 2 of the magnetic 400's. i was going to sell them.
-another word of advice...don't buy dual ballasts. i bought a single and a dual....one of the dual went bad. so i had to take 2 halides off of my tank to service the single bad one.
again- lucky i saved the 400's. | 
