It's the fourth year in a row the Opera House has been lit up to celebrate Diwali.
NSW Premier Gladys Berejiklian formally opened the event and said by lighting the sails of the Sydney Opera House, it brings millions of people in Australia and around the world together.
"The lighting of the Opera House signifies the ancient tradition of lighting ceremonial lamps at this time, marking the eternal triumph of light over darkness," Ms Berejiklian said.
"It is very enormous. We know Indians are celebrating Diwali in Sydney near the Opera House and under the Harbour Bridge,” Dr Harinath said.
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