Saw these while wandering aimlessly around Bunnings yesterday. They're just cheapies and do not include the PAR38 bulbs but may fit the bill for someone wanting Motion Detector lights on a tight budget or just for parts for 'experimenting'. As you can see by the pic there was still quite a lot of stock at my local store (Salisbury QLD) however they may also be available at others around the country too.
Here's a closeup of the PIR Fitting mentioned above: http://upload.ozbargain.com/2012/08/26/9246_imag0105_large_.…
They're also clearing out other PAR38 fittings in the range too including the following:
http://upload.ozbargain.com/2012/08/26/9248_imag0106_large_.…
http://upload.ozbargain.com/2012/08/26/9249_imag0107_large_.…
Obviously as these units are 240V Mains rated they will need to be installed by a licensed electrician… blah, blah, blah.
Bunnings in Perth had the "DIY" ones ( cord plugs into an existing bayonet socket) for $5, but they will cost a lot more in power bills.
According to the specs they uses 4W standby. How much do the Crompton ones use?