As per the product's listing, you will require direct 240V GU10 fixtures in order to use these lights sufficiently in your home.
Please refer to the following link to determine which type of fixture you have:
http://www.led-depot.com.au/converting-from-halogen-to-led-downlights/
If you have a dimmer switch present in your circuit, you will need to use dimmable downlights, as using other downlights may flicker.