Between 2005 and 2010, Federal efficiency standards became phased into effect, covering fluorescent magnetic ballasts designed to operate full-wattage F40T12, F96T12 and F96T12HO lamps. Subsequent standards expanded this scope to include energy-saving versions of these lamps (e.g., 4-ft. 34W T12). In July 2010, efficiency standards regulating fluorescent magnetic T12 ballasts entered their final phase, effectively [...]