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Kosnic 18W Daylight LED 4 Pin DD Bulb

Item code: 11583

3 Year Guarantee


The Kosnic 18W LED 4 Pin DD Bulb uses 52% less energy than the 38W fluorescent 2D bulb it replaces and can be used with an optional emergency lighting module, available to purchase separately.

  • A+ energy rating
  • 18W equivalent to 38W compact fluorescent
  • GR10q cap fitting
  • Daylight, 6500k
  • 30,000 hours average life expectancy
  • 3 year guarantee
  • Emergency conversion pack available to purchase separately
  • Size: L 192 x W 192mm
See Full Description
£20.49 ex.VAT

*Expected delivery date

Monday 27th January

Order by 3:45pm Today for delivery on Monday 27th January

More Info

Code Unit Price ex.VAT Stock Qty Buy
1-9 10+
£21.84 £20.49
In Stock


The Kosnic 18W LED 4 Pin DD Bulb replaces a 38W CFL equivalent. It uses 52% less energy and, with a lifespan of 30,000 hours, lasts up to 3 times longer. One of the benefits of this Kosnic lamp is its option for plug-in conversion into an emergency light; a special socket and green LED is included for this purpose. The conversion pack is available separately from Lyco.

Installation Videos

If you are looking to replace an electronic ballast or a choke-style ballast with starter, we have 2 installation videos to guide you step by step.

To replace an electronic ballast watch the following video:

To replace a choke-style ballast with starter watch the following video:

Certified with an A+ energy rating, the Kosnic 18W LED 4 Pin DD Bulb emits 1600 lumens of 6500K cool white daylight-coloured light in a 120° flood beam. An impressive luminous efficacy of 88 lumens per watt is specified together with a peak luminous intensity of 530 candelas.

Other benefits of the Kosnic 18W LED 4 Pin DD Bulb over fluorescent equivalents include instant full-power start, high tolerance of frequent switching, negligible UV or IR output, no mercury content, reliable low-temperature performance (down to -20°C), resistance to shock and vibration. Please note that this bulb is non-dimmable, unlike typical 4-pin CFL 2D lamps.

To achieve maximum energy savings with the Kosnic 18W LED 4 Pin DD Bulb, the control gear of the fitting should be bypassed during installation for direct supply from the mains.


Additional Information

Supplier Code KLED18STD/4P-W65
Brand Kosnic
Guarantee 3 Years
Length 192mm
Width/Dia 192mm
Type Light Bulb
Bulb Shape 2D & Double Ds
Energy Rating A+
Dimmable Non-Dimmable
Cap Code GR10q
Cap 4 Pin
Watts 18W
Equivalent 38W
Voltage 90V - 240V
Lumens 1600
Average Hours 30000
Beam 120°°
Beam Flood
Light Colour Daylight
Colour (K) 6500
Bulb Finish Diffused
Bulb Type LED

Delivery Information

Place your order online Monday to Thursday before 7:45pm, before 3:45pm on Friday, or 1:45pm on a Sunday, and subject to availability*, it will be picked, checked, packed and dispatched within minutes. Once your order is on its way, you’ll receive regular updates on its progress, together with tracking information allowing you to monitor where it is on its journey.

How much does delivery in the UK cost?

3-5 day:£0.00 when you spend over £50.00 (excl. VAT)
£3.99 when you spend under £49.99 (ex VAT)
1-2 day:£5.99

Can I get free delivery?

We offer free ‘standard’ delivery to UK Mainland (except selected postcodes) for any order that is over £50 (excl. VAT). This takes three to five working days for delivery.

How does it work for ‘Highlands and Islands’ or overseas deliveries?

* Some products are not available for immediate dispatch. See product page for details. To read more about our delivery service, zones and special rates, visit our delivery page.
Feefo Reviews

Feefo Reviews - Average 100% (2 reviews)

100 2 100
Kosnic 18W Daylight LED 4 Pin DD Bulb
Date Score Customer Comment Our Response
16-Jan-2020 Product:
Good replacement and easy to install, came with wiring instructions.
23-Sep-2019 Product:
Well made and long lasting. Produces a strong evenly distributed light.
Ideal replacement for the former double D fluorescent tube light
Read more reviews on Feefo