NLS 20405 | 20w Tri-Colour LED Dimmable Downlight 1800-1900lm

Name: NLS 20405 | 20w Tri Colour LED Dimmable Downlight 1800-1900lm | 150mm Hole
Brand: NATIONAL LIGHT SOURCES
SKU: 20405
Price: 27.66 AUD
Availability: InStock

Learn more by watching our NLS 20405 | 20w Tri Colour LED Dimmable Downlight 1800-1900lm | 150mm Hole video.

Additional related video.

NLS | 20w Tri-Colour LED Dimmable Downlight 1800–1900lm | White Recessed

The NLS 20405 is a 20-watt LED downlight rated 240V 50Hz with tri-colour tuning (3000K, 4000K, 6000K), designed for flush ceiling mounting via a 150mm cut-out. The 20405 delivers 1800–1900 lumens with a 120-degree beam angle and is fully dimmable with leading-edge or trailing-edge dimmer switches. It complies with MEPS AS/NZS 4847.2-2010 and is rated IP44 for indoor and protected outdoor installations. The 20405 comes complete with driver, flex, and plug.

Upgrading from older halogen or incandescent downlights is a common retrofit in domestic and commercial settings. Most existing downlights operate on 50mm to 100mm hole spacings, but modern LED fixtures often require larger cut-outs for cooling and driver placement. The 20405 solves this with a 150mm cut-out that covers 170mm-plus gaps left by older fittings. Licensed electricians value the large footprint because it eliminates the need for trim rings or repair work on ceilings, and the tri-colour tuning simplifies site-specific matches when retrofitting houses with mixed colour-temperature fittings. The 120-degree beam angle floods ceiling voids evenly, a practical advantage over narrow-beam alternatives when upgrading whole rooms or open-plan layouts.

The NLS 20405 fits electrical contractors' workflows because the downlight ships with flex and plug included, so it wires straight into a surface socket without rewiring. The dimmable design works with both leading-edge and trailing-edge dimmers, which matters on renovation jobs where the site's existing switch technology is unknown. Brightness and colour tuning give contractors a quick upsell on standard quotes (most homeowners ask "can we make them brighter?" or "can we match the kitchen warmth?"), and the tri-colour feature commands retail margins that single-colour units do not. Stock rotation is straightforward because all NLS 20405 units use the same ballast and optics—bulk orders simplify inventory tracking.

Features

20-watt power consumption — delivers 1800–1900 lumens with 90% energy saving versus traditional incandescent downlights, rated to AS/NZS 4847.2-2010 MEPS standard.
Tri-colour LED tuning — switch between 3000K warm white, 4000K neutral, and 6000K daylight to match existing fittings or customise room ambience without swapping globes.
Dimmable with standard dimmers — works with both leading-edge and trailing-edge dimmer switches, so no special circuit upgrades are needed on retrofit jobs.
120-degree beam angle — wide flood pattern lights entire ceiling cavities and large rooms evenly, reduces dark corners common with narrow-beam downlights.
150mm cut-out diameter — covers gaps from 150mm up to 170mm left by old fittings, eliminating trim-ring and ceiling-repair costs on retrofit work.
IP44 rating — rated for indoor use and protected outdoor installations; not suitable for unshielded or fully exposed wet locations.
Includes driver, flex, and plug — the complete downlight assembly plugs directly into a standard surface socket; no rewiring or ballast installation required.
50,000-hour lifespan — rated for approximately 50,000 hours of continuous operation, translating to 10+ years at typical domestic usage rates.
240V 50Hz mains operation — standard Australian power rating; input current 0.1A and power factor 0.95 for efficient integration into domestic and commercial circuits.
White finish — semi-recessed trim ring finish blends with ceiling voids; does not project below plasterboard plane when flush-installed.

Where to use

Lounge and entertainment areas — the NLS 20405 floods living rooms and open-plan spaces with brightness, colour-tuning lets homeowners dial in warm or cool light depending on time of day and mood.
Kitchens and dining — triple-colour tuning simplifies matching existing pendant or wall-mounted fittings; dimmable design supports ambient and task lighting on a single circuit.
Bedroom ceiling retrofits — replace old incandescent downlights with the 20405 for silent, flicker-free operation and colour warmth control, especially useful in master bedrooms and guest rooms.
Bathroom ceiling lighting — IP44 rating and recessed profile suit bathroom ceilings; moisture-sealed driver sits safely within the ceiling void.
Workshop and garage upgrades — high lumen output (1800–1900lm) and wide beam angle brighten workbenches and storage areas; full brightness is instant (no warm-up time unlike halogen).
Commercial office retrofits — fits standard suspended-ceiling grids; dimmer compatibility supports meeting rooms and flexible office layouts.
Renovation and new-build specifications — the plug-and-play design speeds up interior-fit work; colour tuning appeals to property finishers and developers targeting high-value rental or sale listings.

The NLS 20405 is not suitable for fully exposed outdoor or wet-weather installations, submerged or splash-immersion use, or non-dimmable circuits where a dimmable driver would create compatibility issues. The 150mm cut-out is mandatory and cannot be reduced; do not attempt to install into smaller ceiling voids.

Verified Sparky Direct customer reviews: NLS 20w Tri-Colour LED Dimmable Downlight (20405)

"Lights are very bright and light up my large loungeroom with ease." — Brett H

"They do dim which many LEDs claim to do but can't." — The GC

"I could not wipe the smile off her face when she turned it on." — Sparky Mark

(20405)

What colour temperature options does the NLS 20405 offer?

The 20405 is tri-colour tunable with three selectable temperature options: 3000K warm white for relaxed ambience, 4000K neutral for general task lighting, and 6000K daylight for kitchens and work areas. You can switch between colours without changing globes.

Can I install this downlight myself, or do I need a licensed electrician?

Installation must be carried out by a licensed electrician. The 20405 requires a 150mm ceiling cut-out, routing of the driver into the ceiling void, and safe connection to the home's electrical circuit. In Queensland and most of Australia, downlight installation is a notifiable electrical job.

Does this downlight work with my existing dimmer switch?

Yes, the 20405 is fully dimmable and compatible with both leading-edge and trailing-edge dimmer switches. No special dimmer or circuit modifications are needed. Check that your dimmer is rated for LED loads (most modern dimmers are) for flicker-free performance.

What is the difference between the NLS 20405 and the older single-colour downlights?

The 20405 delivers 1800–1900 lumens from 20 watts, compared to older 13–15 watt single-colour units delivering 900–1350 lumens. The tri-colour tuning gives you flexibility to match different colour temperatures around your house without swapping units. The 150mm cut-out also covers larger ceiling voids left by older fittings, eliminating trim-ring costs.

How long will this downlight last?

The 20405 is rated for 50,000 hours of operation. At typical domestic use (3–4 hours per day), this equates to approximately 10–15 years before brightness noticeably dimishes. The driver and LED array have equal lifespans; no components are user-replaceable.

What is the warranty on this downlight?

The 20405 comes with a two-year manufacturer's warranty covering manufacturing defects. Warranty is void if the downlight is modified, used outside its rated electrical parameters, or installed by an unlicensed person. In-home servicing is available through Sparky Direct's warranty team; contact them within 48 hours of fault detection.

Will this downlight work in bathrooms and wet areas?

The 20405 is IP44 rated, meaning it is suitable for indoor installations and protected outdoor locations (eaves, covered patios). It is not rated for unshielded wet areas, splash zones, or full-immersion locations. Bathroom ceiling use (above the ceiling plane, inside the void) is safe; do not use over shower enclosures or in direct-spray environments.

Where can I buy the NLS 20405 near me?

The NLS 20405 is available online from Sparky Direct, with Australia-wide delivery to any state or territory including regional areas. Sparky Direct is an Australian electrical wholesaler established in 2005, supplying more than 500,000 customers with transparent trade pricing.

100-Day Fuss-Free Returns
We want you to love what you buy—but if you change your mind, that’s okay too. That’s why Sparky Direct offers a 100-day money-back guarantee.

Items must be unused, with all parts, accessories, and original packaging.
We can’t accept returns if the product is damaged, incomplete, or not in resalable condition.
Proof of purchase is required.
Return shipping is the responsibility of the customer.

If your item isn’t in its original condition, please contact us before returning it—we might save you time and money.

All products come with a manufacturer’s or supplier’s warranty

Warranty starts from the Invoice Date
Some suppliers offer in-home warranties and handle claims directly, so you won’t need to uninstall or return the product. Chat with us to check if your product qualifies.
Sparky Direct isn’t responsible for losses caused by product failure.
Warranties are void if products aren’t installed by a licensed electrician.

Damaged or Faulty Goods
If your order arrives damaged or is faulty, let us know within 24 hours.

Sparky Direct will pay for return shipping via an emailed return label.
If the fault is confirmed, we will send you a replacement item or provide a refund.

Exclusions
We can’t accept returns for:

Items that have been installed, modified, or used
Clearance, End of life, Discontinued, or special order items (unless faulty)
All PPE Items
Goods returned without original packaging or proof of purchase

How to Request a Return

Contact our customer service team with your order number.
Confirm it’s eligible under our return or warranty policy.
Pack the item securely and return it using a trackable service.
Once we receive and inspect it, we’ll process your refund or replacement.

Warranty starts from Invoice Date

Domestic Use: 1 Year
Commercial Use: 1 Year
Warranty Method: Return to Sparky Direct

These specifications and characteristics outline physical, mechanical, electrical details.

Brand	NATIONAL LIGHT SOURCES
SKU	20405
Model #	20405NLS
Barcode #	9336700013615
Package Weight	0.420kg

TYPE	VALUE
Type	Down Light
Brand	National Light Sources
Colour	White
Rated Current (A)	0.1
Standards	MEPS AS/NZS 4847.2-2010
Power Source	240V
Mounting	Recessed
Lumens (lm)	1800
Lighting Technology	LED
Light Colour (K)	3000 4000 6000
Dimmable	With Leading Edge or Trailing Edge Dimmer
IP Rating	IP44
Beam Angle	120 Degrees
Life time	50,000Hrs
Power Consumption	20W
LED String/Strip Type	N/A
Installation Area	Indoor & Outdoor Protected
Cover Diameter	190mm
Cut out Diameter	150mm
Wattage (W)	20
Voltage (V)	240V

Electrical and HVAC products sold by Sparky Direct are intended for installation by licensed and appropriately qualified professionals in accordance with applicable Australian Standards and regulatory requirements. Customers are responsible for ensuring that any product purchased, including any related or associated components, is compatible and suitable for their intended installation and application.

Sparky Direct does not provide installation advice and does not assess product suitability for individual circumstances unless expressly confirmed in writing. Customers must confirm correct product selection, compatibility, compliance, and suitability with a licensed or appropriately qualified professional prior to purchase.

Tools sold by Sparky Direct must be used safely and in accordance with the manufacturer’s instructions. Customers are responsible for ensuring they have the necessary knowledge and competence to operate any tool purchased. If you are unsure how to safely or correctly use a tool, do not use it and seek guidance from the manufacturer or a suitably qualified professional.

Nothing in this clause limits or excludes any rights or guarantees available under the Australian Consumer Law.

For website terms and conditions https://www.sparkydirect.com.au/terms-of-use

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Cathy

Actually do Dim on 28 October 2021

Having spent 6 months fighting an Ebay Chinese supplier and having to get a test lab here prove their lights would not dim I was, thanks to paypal, able to get a refund. What I learned from this is that 99% of LED's on Ebay will not dim (you'll go insane trying). After that experience I was to say the least gun shy. I phoned Sparkie, they assured me they were dimmable and they had stock. Placed the order just after lunch and had them on The GC next day ... now that was remarkable. Better still they dim and are stable. After about 4 hours I thought I saw a little "wobble" but haven't since so likely a supply issue. These do need the full 150mm hole to mount and my only criticism is that the retaining spring could be a little stronger. All up my faith restored; there is such a thing as a dimmable LED (just stay away from Ebay) Good job Sparkie :-)

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NLS 20405 | 20w Tri Colour LED Dimmable Downlight 1800-1900lm | 150mm Hole

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