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3 Years Warranty
L4Y Best Choice
280°
Beam angle for focused or wide lighting
Dimmable
A suggestion, not a specification. A calculator can get it wrong — have a licensed electrician confirm the driver, the total load and the wiring before you order.
Find the right driver for this fitting
Product Description
xThe Domus KEY-G5.3-TRIO is a 4 W LED bi-pin globe on a G5.3 base, running on 12 V DC, with switchable 3000 K / 4000 K / 5000 K, CRI ≥90 and a 280° beam.
⚠ Read this before you order: it is 12 V DC and it needs a driver. A G5.3 bi-pin is the low-voltage base — two straight pins — and it will not work in a 240 V fitting.
It requires a 12 V DC constant-voltage LED driver, which is not included. If you are replacing an old halogen MR16 you almost certainly have a transformer already — but an iron-core or electronic halogen transformer is not the same thing as an LED driver, and it is the usual cause of flicker or a globe that will not strike. Tell us what is behind the fitting and we will tell you whether it needs changing.
⚠ The title on this listing says “Non Dimmable”. Its own datasheet, its record and its web address all say dimmable. Three sources against one. We have flagged it with Domus; if dimming matters to your job, confirm with us first rather than relying on either line.
What CRI ≥90 buys you at 4 W
- CRI ≥90 is a step above the ≥80 most of this catalogue runs. Colours look like themselves — timber, skin, fabric and food rather than a flattened version of them.
- It matters most where the light is close to what you are looking at: display cabinets, joinery niches, a dressing area, artwork.
- ⚠ High CRI usually costs efficiency, and it does here — 350 lm from 4 W is about 88 lm/W. That is a fair trade for a display globe, not a reason to light a whole room with them.
The 280° beam is the other unusual part
Most MR16-format lamps throw a narrow cone because the reflector is part of the lamp. This one is a clear polycarbonate globe with a 280° spread — it lights almost the whole sphere around itself.
- ✅ In an open fitting or a shade that is exactly what you want: the fitting shapes the light, not the lamp.
- ⛔ In a recessed housing with no reflector it will not throw a beam the way a halogen MR16 did. If you are after a defined pool of light on a floor, this is the wrong lamp.
The colour switch
Switchable between 3000 K (330 lm), 4000 K (350 lm) and 5000 K (330 lm).
- ⚠ The middle setting is the brightest, by about 6%. That is normal — a phosphor tuned for neutral white is more efficient than one tuned warm or cool — but it means the room gets slightly dimmer as well as warmer when you switch down.
- ⚠ Switch every globe in a fitting to the same setting. In a multi-lamp fitting a single odd one out is very visible.
Where it works
- ✅ Existing 12 V bi-pin fittings — with a proper LED driver.
- ✅ Display cabinets, joinery niches, dressing areas — where CRI ≥90 earns its keep.
- ✅ Open fittings and shades, where the 280° spread is an advantage.
- ⛔ Not 240 V fittings — wrong base, wrong voltage.
- ⛔ Not where you need a narrow, defined beam.
- ⚠ IP20 — dry interiors only.
Specifying it
4 W LED, G5.3 bi-pin base, 12 V DC. Ø18.5 × 45 mm. Output 330 lm at 3000 K, 350 lm at 4000 K, 330 lm at 5000 K, switchable. CRI ≥90, 280° beam, 50,000 hrs. Requires a 12 V DC constant-voltage LED driver — not included. ⚠ Dimming: the datasheet and the record say dimmable; the product title says non-dimmable. Confirm with us before you rely on it. Clear polycarbonate body, IP20. Warranty 3 years.
Supplied and supported by Lights For You.
Questions
Is it dimmable or not?
Ask us before you rely on it. The datasheet says dimmable, the record says dimmable and the web address of this listing says dimmable — the product title is the only source that says non-dimmable. Three against one, and we have raised it with Domus rather than quietly picking a side. If dimming matters to your job, confirm with us first.
Will it fit my existing downlights?
Only if they are 12 V with a G5.3 bi-pin holder — two straight pins, the low-voltage base. It will not fit or work in a 240 V fitting. Bases are the most common ordering mistake in this catalogue, so check the holder rather than the fitting.
Can I use my old halogen transformer?
Usually not, and this is where most low-voltage LED problems start. It needs a 12 V DC constant-voltage LED driver. An iron-core or electronic halogen transformer is a different device, and driving an LED globe from one typically shows up as flicker, buzz or a lamp that will not strike. Tell us what is behind the fitting and we will tell you whether it needs changing.
Is the driver included?
No. The globe is sold on its own and the 12 V DC constant-voltage driver is separate. Ask us and we will size one for the number of globes you are running.
What does CRI ≥90 actually get me?
Colours that look like themselves. Most of this catalogue is CRI ≥80, which is fine for general lighting; ≥90 is a visible step up where the light falls close to what you are looking at — display cabinets, joinery niches, a dressing area, artwork. It costs a little efficiency, which is why it belongs in those places rather than across a whole house.
Why is the 4000 K setting brighter than the others?
350 lumens against 330 at both 3000 K and 5000 K — about 6%. That is normal: a phosphor tuned for neutral white is more efficient than one tuned warm or cool. It does mean the room gets slightly dimmer as well as warmer when you switch down.
Will it throw a beam like the halogen it replaces?
No, and this is the important difference. A halogen MR16 has its reflector built in; this is a clear globe with a 280° spread, so it lights almost the whole sphere around itself. In an open fitting or a shade that is exactly what you want. In a bare recessed housing with no reflector, you will not get a defined pool of light on the floor.
Product Specifications
xSpecifications
| Brand | Domus Lighting |
|---|---|
| Model / SKUs | KEY-G5.3-TRIO — 65124 |
| Lamp Base | G5.3 bi-pin — ⛔ low voltage, not 240V |
| Voltage | 12V DC — ⛔ requires a constant-voltage LED driver (not included) |
| Wattage | 4W |
| Lumen Output | 330lm @3000K · 350lm @4000K · 330lm @5000K |
| Colour Temperature | 3000K / 4000K / 5000K — switchable |
| Colour Rendering | ✅ CRI ≥90 — above the ≥80 used across most of this range |
| Beam Angle | 280° — near-spherical, not a reflector beam |
| Dimming | ⛔ Datasheet and record say dimmable; the title says non-dimmable. Confirm with us |
| Dimensions | Ø18.5 × 45mm |
| IP Rating | IP20 — dry interiors only |
| Material | Clear polycarbonate |
| Lifespan | 50,000hrs |
| Warranty | 3 Years |
Variant specifications
| Setting | Output | Use |
|---|---|---|
| 3000K | 330lm | Living areas, bedrooms, display of warm materials |
| 4000K | 350lm — the brightest | Kitchens, joinery, task areas |
| 5000K | 330lm | Inspection and display of cool materials |
Data Sheet & Manual
xWarranties, Return & Refund Policy
xWarranties
For all warranty claims please ensure you have your proof of purchase at hand, an invoice from your electrician from the installation and check the faulty product is within the applicable warranty period. Warranty is replacement only.
Lights For You is not responsible for damages caused by unprofessional installation, modified products or manipulated by the customer or by any other person not authorised by the manufacturer; as well as by improper use, manipulation and/or short circuits, apparent signs of improper treatment.
Faulty items: lodge warranty directly with the brand (manufacturer). Keep proof of purchase.
Damaged or Missing Items
Notification of any damages or missing items must be received by Lights For You within seven (7) days of receipt of the product. Please email photos to ashfield@lightsforyou.com.au.
If the product is to be repaired or replaced, it must correspond to the one originally sent by Lights For You and the customer must include the delivery note and/or invoice.
Returns
Change of Mind Returns
- Customers who wish to return a product due to a change of mind or cancelled order may do so within thirty (30) days of receipt.
- The customer is responsible for the shipping costs for a change of mind return, irrespective of any free, discounted or any other type of shipping promotion that may have been applicable at the time of your order. This includes any costs you incur for us shipping the product to you in the first place and the cost of shipping the product back to us.
Lodge a Return
You must lodge a return request via the below request form.
Excluded from Change of Mind
- Clearance items
- Discontinued items
- Globes
- Custom items
- Made to Order (incl. custom cut profiles & LED strips)
- Lamp shades
- T4 fluorescent tubes
- Gift cards
Credits will be issued in the form of store credit or gift voucher and will be equal to the price paid for the product minus the cost of shipping. Store credit vouchers are valid for six months from the date of issuance.
Our Rights
We reserve the right to refuse a return in cases where we cannot be reasonably satisfied that you purchased the product from us or where we are not responsible for the damage in accordance with our Faults & damages policy.
Cancellations
Customers who wish to cancel all or part of an order due to change of mind or incorrectly ordered may do subject to cancelling in within 12 hours, during business hours from time of purchase. Once products have been shipped, you cannot cancel them.
Your Options
- Restocking fee: 20% will apply unless otherwise stated, or unless another order of equal or greater value is placed in lieu of this re-stocking fee.
-
Credit: will be issued in the form of store credit and will be equal to the price paid.
Please refer to the following link to learn more about our policies
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