 Very few NBA teams purchased the AS&I (or later, Trans-Lux) units when the new rule was adopted in 1991.The last NBA arena to use the manufacturer's unit was the Charlotte Coliseum (II), which installed a successor Trans-Lux unit for the 2001–02 season (the Hornets' last in Charlotte, but the arena closed after the 2004–05 season, the Bobcats' inaugural season, after its replacement, the Spectrum Center, opened (with a new Daktronics unit).By 2011, all NBA venues used either a Daktronics or OES system.