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Part Number:


Osram LED 500mm Architectural 4.9W S14s Dimmable LEDinestra Warm White Opal

Part Number: 4437

Osram LED 500mm Architectural 4.9W S14s Dimmable LEDinestra Warm White Opal

Cap Type: S14s


Shape: Architectural


Power Consumption: 4.9W


Colour of Light: Warm White

Warm White

Total Lumens: 470lm


Dimmable: Dimmable


£19.79 inc. VAT

FREE UK Delivery on orders over £50 (Standard delivery)

    • Glass Type: Opal
    • Rated Life: 25,000 hours
    • New 2021 Energy Rating: F (A Pre-2021)
    • Energy Saving: 88% saving on a 40W traditional architectural

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Osram LED 500mm Architectural 4.9W S14s Dimmable LEDinestra Warm White Opal

  • Cap type: S14s
  • Power Consumption: 4.9W
  • Equivalent: 40W Traditional Architectural
  • Colour Output: Warm White
  • Dimensions: Diameter=30mm Length=500mm

The new Dimmable S14s LED architectural light bulbs from Osram are a direct replacement for the traditional incandescent light bulb designed for a fitting free appearance in fitted furniture, bathroom lighting etc.

At first glance they may seem to be quite expensive but they last 20 times longer than a standard light bulb and consume 80% less electric without any compromise on brightness.

Fitted with special S14s twin oval peg single contact caps for a discreet installation into the luminaire.

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

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.

Manufacturers Warranty

This product is also covered by a manufacturer's warranty for a period of 4 years from date of purchase. Please visit the manufacturer's website for further details.

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 AC33891
Barcode 4058075607071
Equivalent 40W
Technology LED
Cap S14s
Shape Architectural
Colour Warm White
Manufacturer Osram
Cap Type S14s
Voltage 240V
Power Consumption 4.9W
Dimmability Yes - Dimmable
Total Lumens 470lm
Equivalent Wattage 40W Traditional Architectural
Colour Temperature 2700K
Colour Description Warm White
Glass Type Opal
Warm Up Time <0.5 seconds (0-60%)
Mercury Content 0mg
Average Rated Life (L50) 25,000 hours
Switching Cycles 100,000
Energy Saver Yes
EEI Pre-2021 Energy Rating A
EEI 2021 Energy Rating F
MPN AC33891
Diameter 30mm
Length 500mm
Estimated Running Cost £2.59 per year based on 5-hours per day @ Jan 24 Price Cap (29.0p/kWh)
Estimated Running Cost Saving £18.58 per year based on 5-hours per day @ Jan 24 Price Cap (29.0p/kWh)