Uploaded with ImageShack.us so whats the deal here? ive been lookin for excuses to upgrade, are ALL magnetic ballasts this shitty? its like 37% efficient. im using 2 150w hps with advance brand ballasts (suppsedly high standards) and there almost if not more inefficient. im trying to help those who are thinking the 150 is a cheaper option cos its surely not presenting itself that way to me and the formulas used to calcualte.