TrustedReviews have looked at the OKI C8600n A3 Colour LED Printer
Its size is partly due to OKI’s print technology, which is based on high-definition LED strip illumination, rather than a laser beam. The machine uses an in-line colour engine, which doesn't require the focusing and deflection mechanisms needed by laser printers. It also means that colour prints come through virtually as quick as black ones.OKI C8600n A3 Colour LED Printer Review