Sydney Opera House, NSW Parliament and Melbourne Airport were lit up on 21st October for Deepavali Night this year (2014). Deepavali is on October 23, Sydney Opera house will be lit only on October 21 whereas NSW Parliament house will be lit from 21st October to 5th November celebrating the spirit of Deepavali.
In Melbourne, The following buildings will be lit up for Deepavali Celebrations
illumination of Iconic Buildings
Parliament of Victoria
Consulate General of India
Australia India Institute