Millions of festivalgoers are expected to descend on Sydney for the tenth year of the popular Vivid light spectacular, but some visitors have lamented the pedestrian bottlenecks after the opening night on Friday.

The Berejiklian government is hoping to outdo last year's record of 2.33 million attendees over the course of the 23-day festival, which runs until June 16.

The Sydney Opera House sails are lit for the 10th anniversary of Vivid on Friday. Credit:Brook Mitchell

The festival includes not only light displays but music shows and "ideas events" running at venues across the city, including Circular Quay, Darling Harbour, the Botanic Gardens, The Rocks, Barangaroo and Walsh Bay.

The Luna Park precinct at Milsons Point will also be illuminated for the first time this year.