 The show draws an international attendance of exhibitors and visitors in the lighting, audio and related technologies sector of the entertainments industry.The show originally started in 1977 at the Bloomsbury Crest, London, launching under the name of Discotek 77.In 1982, whilst still at the Bloomsbury Crest, it was renamed the BADEM Light & Sound Show to mirror the name of the fledgling trade association that had been set up for the sector - the British Association of Discotheque Equipment Manufacturers.