The sails of the Sydney Opera House were illuminated to mark the start of the Vivid Sydney festival on Friday, May 24, 2019. Vivid Sydney, an annual outdoor cultural festival featuring light installations and projections, will run from May 24 to June 15. [Photo: IC]"

The sails of the Sydney Opera House were illuminated to mark the start of the Vivid Sydney festival on Friday, May 24, 2019. Vivid Sydney, an annual outdoor cultural festival featuring light installations and projections, will run from May 24 to June 15. [Photo: AFP/Saeed KHAN]"

Visitors gather to see the light installations at Sydney Harbour at the start of the Vivid Sydney festival on Friday, May 24, 2019. [Photo: AFP/Saeed KHAN]"

Visitors gather to see the light installations at Sydney Harbour at the start of the Vivid Sydney festival on Friday, May 24, 2019. [Photo: AFP/Saeed KHAN]"

Ferries make their way past the Harbour Bridge during the Vivid Sydney festival on Friday, May 24, 2019. [Photo: AFP/Saeed KHAN]"