Kosnic 12W Cool White LED 4 Pin DD Bulb

£19.49 £16.24
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  • G Energy Rated G Energy Rated
  • 2 Year Guarantee 2 Year Guarantee

Key Features

The Kosnic 12W LED 4 Pin GR10Q Lamp is a retrofit replacement for a 28W fluorescent 2D equivalent, offering around 47% in energy savings.

  • A+ energy rating
  • 12W = 28W compact fluorescent
  • GR10q cap fitting
  • Cool White, 4000k
  • 30,000 hours average life expectancy
  • 3 year guarantee
  • Emergency conversion pack available to purchase separately
  • Size: L 192 x W 192mm

Product Description

The non-dimmable Kosnic 12W LED 4-Pin GR10Q Lamp is intended as a retrofit replacement for a 2D low-energy fluorescent lamp. Aside from its 47% energy advantage, this LED lamp also lasts 3 times longer than many fluorescent lamps with its 30,000 hour lifespan.

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

The Kosnic 12W LED 4 Pin GR10Q Lamp emits 940 lumens of 4000K cool white light in a 120° beam. It is equal in output to a 28W fluorescent low-energy DD bulb and has a peak luminous intensity of 320 candelas.

Other advantages of the Kosnic 12W LED 4-Pin Lamp over fluorescent equivalents include: instant full-power start, negligible UV or IR output (less likely to attract insects or cause fading), zero mercury content, reliable low-temperature performance (down to -20°C), shock-proof and vibration-proof.

When installing this Kosnic lamp into a standard fluorescent fitting with a magnetic ballast, the starter should be removed beforehand. With a high-frequency electronic fitting, the ballast needs to be completely bypassed.

The energy-efficiency and sheer longevity of the Kosnic 12W LED 4-Pin GR10Q Lamp will reduce running and maintenance costs considerably.


The dimensions of the Kosnic 12W LED 4-Pin GR10Q Lamp are:

  • Length: 192mm
  • Width: 192mm

Product Specification

More Information
Supplier Code KLED12STD/4P-W40
Brand Kosnic
Guarantee 2 Years
Length 192mm
Width/Dia 192mm
Type Light Bulb
Bulb Shape 2D & Double Ds
EU Energy Label G
Dimmable Non-Dimmable
Cap Code GR10q
Cap 4 Pin
Watts 12W
Equivalent 28W
Voltage 240V
Lumens 940
Average Hours 30,000
Light Colour Cool White
Colour (K) 4000
Bulb Finish Diffused
Technology LED

Customer Questions

What do Energy Ratings mean?

Two new EU regulations have recently come into effect and they have changed the way lighting energy efficiency is assessed and labelled, as well as the quality of light output of LED lamps and luminaires. View our infographic here.

Customer Reviews