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Part Number: 5824

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

Part Number: 5824

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

Cap Type: ES-E27


Shape: GLS


Power Consumption: 21W


Colour of Light: Warm White

Warm White

Brightness: 2452lm


Dimmable: Yes


£12.75 inc. VAT

FREE UK Delivery on orders over £50 (Standard delivery, excludes orders of oversized items)

    • Glass Type: Opal
    • Rated Life: 25,000 hours
    • Energy Saving: 86% saving on a 150W traditional GLS

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

  • 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

This GLS is a newer product from Osram and supercedes their old GLS part codes: 4052899959217.

Please visit the manufacturer's website for up-to-date dimmer switch compatibility lists for this Osram LED GLS light bulb before purchase.
To find the answers to some common questions about LED dimming, please read our guide Dimming for Dummies.

Need more help in choosing a suitable light bulb? Read our guide What is a GLS Light Bulb.

Here at LightBulbs Direct, 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 or LED Smart light bulb bought from Lightbulbs Direct carries a 24-month warranty.

If you should purchase an LED light bulb from LightBulbs Direct 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 4058075462632
Barcode 4058075462632
Equivalent 150W
Technology LED
Cap ES-E27
Shape GLS
Colour Warm White
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
EEI Energy Rating A+
Diameter 67mm
Height 143mm
Estimated Running Cost £5.51 per year (based on 5-hours per day)
Estimated Running Cost Saving £33.83 per year (based on 5-hours per day)