How to Reduce Downlight Holes for New Lights


Downlight Hole Too Big?  

Downlight Resizing Kits

Recessed light fittings have been the most popular lighting choices in many Australian homes. Installing recessed lights means cutting holes into the ceiling. They can turn ceilings into Swiss cheese. We often hear electricians annoyed with ceiling holes that are made too big or are placed in a completely wrong position. 

What is the fix for situations like this?

Worry no more! BoscoLighting is always here to help and will provide a solution!

We have unique downlight resizing kits that can be easily integrated into the current system. Perfect for when a hole is in the wrong place or when upgrading lighting from older larger technologies. Resizing becomes easier and the end result will be much better than using ordinary conversion plates.

You and your customer will be happy for the neat and sophisticated look of the new ceilings. 

Learn how to take advantage of BoscoLighting's downlight resizing kits properly.

What if the ceiling hole is too large? How to reduce downlight holes for new lights? 

Resizing the existing cutouts

Follow these instructions for resizing an existing larger diameter hole in order to install a smaller diameter downlight.


Resizing the existing cutouts

Step 1. Turn off the power supply and ensure the working area is safe. Remove existing downlight and ensure all wires and insulation are clear and that the area is clean and dust free.

Resizing the existing cutouts step2

Step 2. If this is to resize the hole, remove the part of the inner part to suit the new downlight cutout requirement.

Resizing the existing cutouts step 3

Step 3. Apply sufficient plaster to the wings to ensure it holds securely in the ceiling, and place the kit to the ceiling cavity and pull down onto the ceiling surface.

Resizing the existing cutouts step 4

Step 4. Apply the first coat of plaster. Hold the plate ensuring it doesn't move. Remove any excess product from the inner ring when done.

Resizing the existing cutouts step 5

Step 5. Scrape the surface until it’s flush with the ceiling. Then apply a slightly wider second coat of plaster and flatten it out to make the repair less visible. Clean any excess plaster from the inner ring.

Resizing the existing cutouts step 6

Step 6. Repeat the process with extra layer of finishing compound.

Resizing the existing cutouts step 7

Step 7. Once dried, sand the area smooth with the sandpaper block, then prime and paint.

Resizing the existing cutouts step 8

Step 8. Install the new LED downlight.

What if the ceiling hole is in the wrong place? How to patch a downlight hole by downlight resizing kit?

Patching Downlight Hole/Repair Holes Fast


Repair Holes Fast step 1

Step 1. Turn off the power supply and ensure the working area is safe. Remove existing downlight and ensure all wires and insulation are clear and that the area is clean and dust free.

Repair Holes Fast step 2

Step 2. If this is to plug a hole completely, use a screw to fix in the centre. This will give us more control later. Use knife or other cutter to make sure you can place the kit to the cavity.

Repair Holes Fast step 3

Step 3. Apply sufficient plaster to the wings to ensure it holds securely in the ceiling, and place the kit to the ceiling cavity and pull down onto the ceiling surface.

Repair Holes Fast step 4

Step 4. Apply the first coat of plaster. Hold the screw ensuring it doesn't move. Once completed, leave it to dry.

Patching Downlight Hole Step 5

Step5. Remove the screw and scrape the surface until it’s flush with the ceiling. Then apply a slightly wider second coat of plaster and flatten it out to make the repair less visible.

Patching Downlight Hole Step 6

Step 6. Repeat the process with extra layer of finishing compound.

Patching Downlight Hole Step 7

Step 7. Once dried, the plug is completed. Sand the area smooth with the sandpaper block.

Patching Downlight Hole Step 8

Step 8. Prime and paint.

BLTK-RESZ-140

Plaster Hole Resize Kit/Downlight Ceiling Hole Repair Kit


Plaster Hole Resize Kit allows holes in plaster ceilings to be resized down from 120-150mm to 74, 84, 94, 104mm or to plug a hole completely. 

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downlight resize kit
BLTK-RESZ-220 + BLDL-GIT-40
(Coming soon)


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These plaster kits are products that every electrician should carry in vans.

If you have any question or enquiry with the downlight resizing kits, contact us now!

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