Sylvania 4.2w GU10 4000k Dimmable LED Bulb - Cool White

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Key Features

Replaces 50w Halogen - 92% Energy Saving
Cool White - 4000k
Dimmable
345 Lumens
Dimensions: 55mm (L) x 51mm (D)

Sylvania 4.2w GU10 4000k Dimmable LED Bulb - Cool White

Q: What Are the Benefits of Switching to LED Light Bulbs?

LED bulbs use up to 90% less energy, last significantly longer, and offer flicker-free, instant lighting, making them a cost-effective and energy-efficient lighting solution.

Q: Can I Replace Any Bulb With an LED Equivalent?

In most cases, yes. Ensure the base type matches and check that the LED bulb offers a suitable wattage equivalent and voltage compatibility.

Q: How Do I Choose the Right LED Brightness and Colour Temperature?

Use lumens to measure brightness and kelvins (K) to choose colour temperature. Warm white is ideal for relaxing spaces, cool white suits task-focused areas, and daylight is best for detailed tasks or spaces needing natural-style lighting.

Q: Are LED Bulbs Compatible With Dimmer Switches?

Only dimmable LED bulbs work with dimmers, and the dimmer switch must be compatible with LED technology to prevent flickering or noise.

Q: How Long Do LED Light Bulbs Last?

Most LED bulbs last 15,000 to 50,000 hours, offering a significantly longer service life than traditional lighting options.

Year

Warranty

In stock

Over 20 Available

SKU

01-IT0009967

Quick Code

800806

Delivery
Fastest delivery: Monday 10th Nov
Standard delivery: Tuesday 11th Nov

Order in the next ... Details

Key Features

Replaces 50w Halogen - 92% Energy Saving
Cool White - 4000k
Dimmable
345 Lumens
Dimensions: 55mm (L) x 51mm (D)

Details

This Sylvania GU10 is 5w, meaning it is the perfect replacement for a standard 50w Halogen GU10 or an 11w CFL lamp. It has a lumen output of 345 lumens.

The 4000k colour temperature means that this lamp produces a cool and comfortable glow, which the 36° beam angle ensures the light is spread widely across the area of direction. This lamp, being LED, results in 90% savings in energy when compared to the equivalent halogen GU10. This lamp is fully dimmable. Energy Rating A+

Sylvania part number 28442

Specification Table

SPECIFICATION TABLE

Outer Box Quantity (Sold Individually)

Manufacturer Part Number

0028551

Brand

Sylvania

Product Dimensions (mm)

Lumens

360

LED Type

Integrated LED

Voltage

220-240v

Lamp Type

T8 Tube

Cap/Base

GU10

Functionality

Dimmable

Energy Saving %

91%

Energy Efficiency Rating

Beam Angle

CRI

Colour Temperature

4000k - Cool White

Product Warranty

5 Years

Average Lifespan (Hours)

15,000

Delivery & Returns

UK Mainland:

2–3 Day Delivery: £3.95 for orders under £65, free for orders over £65
2–3 Day Courier Delivery: £7.95 (under £65 only)
Next Day Delivery: £4.95 (any order value)
Next Day Courier Delivery: £9.95 (any order value)

Note: Services marked with an asterisk () are unavailable for items over 3 feet in length.*

Non-Mainland UK:

Standard delivery starts at £3.95 for small orders
Courier prices range from £14.95 to £37.95 depending on postcode zone and order size

International Delivery:

Shipping costs are tailored to order size, weight, and location
Email: sales@lampshoponline.com for a personalised quote
Customs fees/duties are the buyer’s responsibility

Terms:

Orders placed before 3 PM (Mon–Fri) are dispatched the same day
No weekend or public holiday deliveries

Product Questions (5)

Customer Questions

What Are the Benefits of Switching to LED Light Bulbs?

LED light bulbs offer a wide range of advantages compared to traditional incandescent or halogen bulbs. They use a fraction of the energy while providing the same level of brightness, helping to reduce household energy consumption and lower electricity...

Can I Replace Any Bulb With an LED Equivalent?

You can replace most existing bulbs with LED equivalents, provided you match the correct fitting, such as B22 (bayonet), E27 (Edison screw), or GU10. It’s also important to consider the lumen output rather than just wattage, as LEDs produce the same...

How Do I Choose the Right LED Brightness and Colour Temperature?

When selecting an LED bulb, focus on the lumen output to determine brightness, as traditional wattage ratings do not apply to LED technology. For example, an 800-lumen LED typically replaces a 60-watt incandescent bulb. This allows you to match your...

Are LED Bulbs Compatible With Dimmer Switches?

Many LED bulbs are not compatible with older dimmer switches designed for incandescent bulbs. To use LEDs with dimmers, you must choose bulbs that are specifically labelled as dimmable and ensure your existing switch supports low-wattage LED dimming...

How Long Do LED Light Bulbs Last?

One of the main advantages of LED bulbs is their extended lifespan. A standard LED bulb typically lasts between 15,000 and 25,000 hours, while premium models can reach up to 50,000 hours. This greatly reduces the frequency of replacements, saving both...