Prometheus is a single-movement work for large orchestra, piano, wordless chorus, and the clavier a lumieres, built on Scriabin’s mystic chord and his conviction that tonality had color. The luce part bathes the hall in the harmony’s hues, ending in blazing white F sharp.
Scriabin imagined further: the unfinished Mysterium was to involve all senses in a week-long rite. Prometheus is the portion of that ambition that exists and gets performed.
For visual music the piece is the canonical precedent, cited by every lumia artist and light-show builder since: a major composer treating light as an orchestral voice, in the score, in 1910.