The swap itself is simple when it is done properly. The electrician pulls the old fitting down, disconnects and removes its transformer, and checks the cable feeding it. In most homes the cable is fine and is reused; where it is heat-damaged or brittle, you are told before anything else happens. The new IC-4 fitting connects through a plug base, presses into the same hole, and its spring clips hold it against the plaster. No patching, no new holes, no dust in the room beyond what falls out of the old can.
Cut-out sizes. Many halogen cans in Melbourne homes sit in a 90 mm hole, a size most current integrated LEDs are made for. Older 70 mm cut-outs, or holes that have been chewed out over the years, get a fitting sized to suit or a slim trim ring, so the finished ceiling looks like it was always that way.
The driver goes where the maker says. Even on a sealed fitting, the small driver box that comes with it is placed to the manufacturer’s instructions, above the insulation with clearance around it rather than buried. That detail is missed on a lot of ceilings, and it is one we photograph.
The old gear leaves with us. Every can, lamp and transformer is bagged and taken away. Nothing is left live, loose or forgotten in the roof space.