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[1] at the Bloomsbury Crest, London, launching under the name of Discotek 77.

In 1985, it relocated to the Novotel in Hammersmith, then to Olympia 2 in 1988, where it stayed until 1992 before transferring to the larger Earls Court 2.

[2] It stayed here for 3 years, announcing that the 2016 show would move back to West London and be hosted at Olympia.

[3] During its time at ExCeL PLASA had been hosted during the month of October - prior to this the show was typically held during September.