Nora Lighting NIO-4EXTC2 2" Ceiling Extension Collar for 4" Iolite New Construction Housings

For homes and commercial spaces alike, the Nora NIO-4EXTC2 gives clean recessed ceiling light with nothing hanging down.

Typical spots: kitchens, living rooms, hallways, bathrooms, offices and retail ceilings. Because the fixture sits flush or out of sight, it works in Modern, Transitional and Scandinavian rooms alike; the finish you pick decides how much it shows.

Where it works

• Residential remodels and new builds, plus offices, shops and hospitality spaces.

Planning tip

Pick the housing first: IC rated if it touches insulation, airtight where energy code asks for it, remodel style when the ceiling is already closed. The trim or LED module goes in after the drywall. (our advice)

What you need to buy

Nora lists these parts to go with it (sold separately):

• NHIOICD-48 – 4" Iolite LED Dedicated IC Airtight New Construction Housing
• NHIOICDCP-48 – 4" Iolite LED Dedicated Chicago Plenum New Construction Housing
• NHIOICD-415 – 4" Iolite LED Dedicated IC Airtight New Construction Housing, 120/277V input; Triac/ELV/0-10V dimming
• NHIOICDCP-415 – 4" Iolite LED Dedicated Chicago Plenum New Construction Housing, 20W
• NHIOICD-420 – 4" Iolite LED Dedicated IC Airtight New Construction Housing, 24W, 120/277V input; Triac/ELV/0-10V dimming
• NHIOICDCP-420 – 4" Iolite LED Dedicated Chicago Plenum New Construction Housing, 24W
• NHIOICD-425 – 4" Iolite LED Dedicated IC Airtight New Construction Housing, 28W, 120/277V input; Triac/ELV/0-10V dimming
• NHIOICDCP-425 – 4" Iolite LED Dedicated Chicago Plenum New Construction Housing, 28W

Specifications

• Brand: Nora Lighting
• Model: NIO-4EXTC2
• Type: Recessed
• Compatible Housings: NHIOICD-48, NHIOICDCP-48, NHIOICD-415, NHIOICDCP-415, NHIOICD-420, NHIOICDCP-420, NHIOICD-425, NHIOICDCP-425
• Weight: 0.3 lb
• Country of origin: China
• Nora item numbers: NIO-4EXTC2

Spec sheet & downloads

Share these with your electrician or contractor before ordering; the spec sheet has the dimension drawing.

• Specification sheet (PDF)

Who this is not for

• Anyone expecting a finished light: the housing needs a trim or LED module.

Frequently asked questions

Which rooms is the Nora NIO-4EXTC2 best for?

It is a good fit for kitchens, living rooms, hallways, bathrooms, offices and retail ceilings.

Can I use it in a commercial space?

Yes. Nora builds it for professional installs. Check local code with your electrician.

What does it need to work?

Nora lists it for use with NHIOICD-48, NHIOICDCP-48, NHIOICD-415, NHIOICDCP-415, NHIOICD-420, NHIOICDCP-420, NHIOICD-425, NHIOICDCP-425. Order the matching parts together so the install is done in one visit.

How do I order the right part?

The Nora item number is NIO-4EXTC2. Send us your plans or old part number if you want us to double-check.

How soon will it ship?

Options with stock on hand usually leave the warehouse in 2–3 business days. If Nora is restocking an option, you can still order it; it ships once Nora has it again. Orders over $100 ship free.

Contractors & project orders

Electricians, builders and designers can order mixed finishes and color temperatures in project quantities. Contact us for larger jobs or a quote.

Why we carry it

We have curated lighting since 2009 and carry Nora because its parts fit what the spec sheet says they fit. Stock levels come straight from Nora's warehouse count, and you can order any choice shown, even one being restocked.

Please note: Because this item is made to order or specially sourced, it is final sale.