Energy Solutions International's (ESI) new RetroPAKs are T8 retrofit kits that allow for a hassle-free upgrade from T12 to T8 fixtures, saving contractors time and energy. With RetroPaks, contractors and maintenance professionals can quickly convert a T12 fixture with a magnetic ballast into an energy-efficient T8 fixture with an electronic ballast. These kits can help reduce a building's energy consumption by over 50%, improve light output, and last up to twice as long, reducing maintenance costs. RetroPaks are already pre-wired and pre-ballasted, and come in a variety of system wattages. We have several configurations in stock on our counters.