Hi Bojan,
Most of the growth in Ballarat is planned on the north/north west side of town. There are considerable urban restriction on subdivision and lot size to the south and south west.
So, keep this in mind about where the light pollution is likely to grow in coming years. Have a look at this if you haven't already for an idea.
http://www.ballarat.vic.gov.au/pbs/c...-strategy.aspx
Cheers.
Darren.