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Friday 13th

Osram 21W Warm White Dimmable LED Frosted GLS Bulb - Screw Cap

Item code: 12122

4 Year Guarantee

If you're after a bulb that really packs a bright punch, the Osram 21W Warm White Dimmable LED Frosted GLS is a fantastic option for use all around the home.

  • Part of Osram Parathom Advance classic range
  • 21W equivalent to 150W incandescent
  • Warm White (2700k) light colour
  • Average life expectancy 25,000 hours + 4 year guarantee
  • Screw cap fitting
  • Dimmable with compatible dimmer switch, sold separately
  • Energy rating: A+
  • Size: L 143 x Dia 67mm

SPECIAL OFFER: £13 off when you spend £100 or more. Use code: FRIDAY13TH at the basket.


In Stock

*Expected delivery date

Tuesday 17th December

Order by 7:45pm Monday 16th for delivery on Tuesday 17th December

More Info

Item Code:



With their impressive life span (25,000 hours) and low energy consumption, the Parathom Advanced classic range of bulbs are some of the best LEDs around. Their warm white glow means you can have a super bright bulb that still emits a soft light, perfect for living rooms, dining rooms or larger bedrooms. They are fully compatible with dimmer switches and their compact design and screw cap makes them easy to fit into standard light fittings. If you previously used 150W traditional style bulbs, the 21W is the closest modern alternative but will use significantly less electricity.

For more information on how to dim this product click here


Additional Information

Supplier Code 4058075292611
Brand Osram
Guarantee 4 Years
Length 143mm
Width/Dia 67mm
Type Light Bulb
Bulb Shape Standard GLS
Energy Rating A+
Dimmable Dimmable
Cap Code ES/E27
Cap Screw (ES E27)
Watts 21W
Equivalent 150W
Voltage 240V
Lumens 2452
Average Hours 25000
Colour Rendering 80
Light Colour Warm White
Colour (K) 2700
Bulb Finish Frosted
Bulb Type LED

Place your order online Monday to Thursday before 7.45pm, or 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. Your order should arrive within 1-2 days across most of the UK mainland.

How much does delivery in the UK cost?

3-5 days: £0.00 when you spend over £70.00
£3.50 when you spend under £69.99
1-2 days: £5.99

Excludes Sundays and Public Holidays.

Can I get free delivery?

We offer free ‘standard’ delivery to UK Mainland (except selected postcodes) for any order that is over £70. This takes three to five working days for delivery.

* 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% (1 reviews)

100 1 100
Osram 21W Warm White Dimmable LED Frosted GLS Bulb - Screw Cap
Date Score Customer Comment Our Response
09-Nov-2018 Product:
exactly what I needed for our uplighter
Read more reviews on Feefo

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