Converting from halogen downlights to energy saving LED downlights can be done for as little as $15 a per light and doesn't require an electrician. In Australia, there are generally 2 standard halogen downlight globes used. Finding out which one your home uses is easy. Simply remove the existing downlight globe from its fixture by pulling it out of the fixture and disconnecting it. Ensure that the power is shut off before doing this. Take note of what kind of base your downlight globe has and reference it with the images below and have a look at the respective led downlight replacements.
Replacing your old halogen globes is simply a matter of swapping out the globe itself. This can be done easily and doesn't require an electrician.
More helpful articles:
All prices are in AUD.