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Part Number: SL5824

Osram GLS LED Light Bulb Dimmable E27 21W (150W Eqv) Warm White Parathom

Part Number: SL5824

Osram GLS LED Light Bulb Dimmable E27 21W (150W Eqv) Warm White Parathom

Cap Type: ES-E27


Shape: GLS


Power Consumption: 21W


Colour of Light: Warm White

Warm White

Brightness: 2452lm


Dimmable: Yes


£12.67 inc. VAT

Bulk Discount Quantity












Osram GLS LED Light Bulb Dimmable E27 21W (150W Eqv) Warm White Parathom

  • Cap type: ES-E27
  • Power Consumption: 21W
  • Equivalent: 150W Traditional GLS
  • Colour Output: Warm White
  • Dimensions: Diameter=67mm Height=143mm

The Parathom Advanced classic range of LED GLS light bulbs from Osram feature high colour consistency and consumes only 21w of electricity despite having a light output equivalent to 150W incandescent (around 80% less power consumption than conventional light bulbs) due to their LED technology.

If you need a powerful lamp, then the 21W LED is a suitable alternative for a traditional 150W incandescent lamp, and is easy to retrofit due to its compact design.

Dimmable. Very long lifetime of up to 25,000 hours. Low energy consumption. High color consistency thanks to narrow binning.

Easy replacement of classic light bulbs thanks to compact design. Instant 100 % light, no warm-up time. Features a commonly used ES-E27 Edison screw (27mm) cap/base.

LED alternative to conventional 150W light bulbs.

Good quality of light; color rendering index Ra : <80; constant chromaticity.

For a full list of compatible dimmers please see

  • 240V 21W (150W equivalent) LED GLS
  • ES-E27 cap
  • Yes - Dimmable
  • 2452 lumens

Here at SimplyLED, we want you to be able to buy with confidence both in ourselves and the products we sell. With this in mind, a number of our bulbs carry a specific warranty that ensures you can do exactly that.

Any LED light bulb bought from SimplyLED carries a 24-month warranty.

If you should purchase an LED light bulb from SimplyLED and have it fail, break or develop a fault at any point within the timeline stated above from the date of purchase, we will happily replace the item or offer a full refund, depending on your wishes.

In instances where large numbers of bulbs fail within a relatively short period of time, we may ask you to return them to us so that they can undergo testing to identify any potential issues.

What doesn't our warranty cover?

In any instance where your bulb has developed a fault, we will do our utmost to replace it or offer a full refund (provided the item is still within its stated warranty period). However, if it becomes apparent that the product has been misused, tampered with or modified in any way, we will view this as having voided its warranty.

'Misuse" includes, but is not limited to, incorrect operation by the user, use of non-dimmable bulbs on a dimmable circuit or connection to or operation with an unsuitable power supply. 'Tampering' or 'modification' can be interpreted as any activity designed to alter the product in such a way that it can be used in a manner that wasn't intended by its original design. This can include rewiring, removing plugs, home repairs or changing components. Unfortunately, we won't be able to replace any item that has undergone any such process.

If you have any further questions about our Warranty or Returns Policy that aren't addressed on this page, please feel free to contact us.

Attribute Value
MPN 4052899959217
Barcode 4052899959217
Equivalent 150W
Technology LED
Cap ES-E27
Shape GLS
Wattage 21 - 40W
Colour Warm White
Lumens 2001 - 3000lm
Dimmable Yes
Manufacturer Osram
Cap Type ES-E27
Voltage 240V
Power Consumption 21W
Dimmability Yes - Dimmable
Total Lumens 2452lm
Equivalent Wattage 150W Traditional GLS
Colour Description Warm White
Glass Type Opal
Warm Up Time <0.5 seconds (0-60%)
Average Rated Life (L50) 25,000 hours
Switching Cycles 100,000
Energy Saver Yes
Diameter 67mm
Height 143mm
EEI Energy Rating A+
Estimated Running Cost £4.41
Estimated Equivalent Running Cost £31.47
Estimated Running Cost Saving £27.06
Estimated Energy Saving 86%
Estimated Life Expectancy 17 Years
Brightness 150W