Obsolescence of T12 magnetic ballasts The Energy Policy Act of 2005 was passed by Congress and signed into law on August 8th, 2005. The act mandated a number of changes in energy policy, including an extension of previous ballast efficiency factor (BEF) standards. These standards are now applied to magnetic ballasts used to light various fluorescent lamps, effectively causing the phase-out of these ballasts in 2010. Many manufacturers have already ceased production of magnetic ballasts in anticipation of the phase-out. Energy efficient ballasts are a cornerstone in the effort to decrease energy consumption. If you’re still using magnetic ballasts, Bulbs.com recommends making the switch now in order to increase efficiency and assure compliance with the law. For more information about making the switch, check out the “Helpful Resources” section below or contact a bulbs.com lighting specialist at 888-455-2800.