The Salesforce Tower will soon illuminate the night sky over San Francisco. The multi-million dollar permanent installation will be officially unveiled atop the city's tallest building next week.

Upon its Tuesday 9 p.m. reveal, the LED and video sculpture will be visible every night — and up to 20 miles away.

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Local artist Jim Campbell, whose work is in the permanent collections of New York's Museum of Modern Art, the Smithsonian American Art Museum and the San Francisco Museum of Modern Art, used more than 11,000 LED lights to create the tower's rainbow display.

Images recorded with cameras placed around San Francisco will complement the multicolor lights.

"The challenges for this work are truly unique with very little precedent," said Campbell, who works out of a studio in the Dogpatch neighborhood. "My goal is to create a work that brings the building to life as a dynamic element of the city, not to simply use the surface of the building as a video screen. I feel very lucky to have been given this opportunity to create a work for the city that I've lived in for over 30 years."

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Over the past few weeks, San Franciscans have gotten a taste of what the Campbell piece has in store. Testing began on the installation in April. One night, light boxes glowed in shades of red, yellow and green. Another evening, giant dancers in silhouettes traipsed across the building's curving crown.

To see the installation for yourself, keep your eyes on the San Francisco skyline on Tuesday, starting at 9 p.m.

Amy Graff, an SFGATE staff writer, contributed to this report.

Michelle Robertson is an SFGATE staff writer. Email her at mrobertson@sfchronicle.com or find her on Twitter at @mrobertsonsf.