Supercars will race under lights in 2018 after a night race was confirmed at Sydney Motorsport Park next August.

The 16-event championship calendar was released on Wednesday with the night race and a new event at the AU$110 million Tailem Bend circuit in South Australia the main changes.

The 2018 calendar also boasts a full championship round at the Australian Grand Prix for the first time.

The night race at Sydney Motorsport Park will be a 300km race from 7pm on August 4.

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Supercars chief executive James Warburton said holding a night race had long been a goal of the championship.

Drivers Simona De Silvestro and Fabian Coulthard tested lighting at the western Sydney circuit in August, hinting then that the venue would be hosting night races in the future.

- AAP