All the halogen bulb will do is keep it warm , anyway dude its winter wrong time of year to be starting an outdoor crop if your plant is only under 3-4 sets of leaves it wont get much bigger til it warms up or as keeko said just leave it outside , pot is a weed and a hardy one ....
Best time to start a crop in mid aussie is in oct - nov - dec , let em power thru summer and then heads up in march ( nsw )
I have some very easy to read grow tips on my site feel free to join up and check it