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Up To 5 Year Warranty

20W Round Surface Mounted
LED Downlight

£ 83.95 inc. VAT
  • 20W LED light source
  • 4000k Natural White light
  • Fixed
  • 50° Beam Angle
  • IP44
  • Aluminium housing, finished in White or Black
  • DISCONTINUED Please see our new large surface mounted fitting


Free UK delivery on orders over £80 3 year warranty


A 20W large surface mounted round LED light fitting, with a fixed lamp.  This surface mounted LED Downlight provides a high quality finish, ideal for use in many locations including retail, restaurant, office and hotel environments.

  • 20W LED light source
  • 4000k Natural White light
  • Fixed
  • 50° Beam Angle
  • IP44
  • Aluminium housing
  • Finished in White or Black
  • Optional – DALI Dimmable
  • Please see our new large surface mounted fitting

Other finishes, colour temperatures and beam angles available.

If you don’t see what you looking for use our LiveChat or give us a call on 01727 600102 

Technical Data

Part Number:  STS421

Wattage:           20W

Lumens:            2000lm

CCT:                   4000K (Natural White)

CRI:                    >80

Voltage:             220V – 240V

Beam Angle:     50°

IP Rating:         IP44

IK rating:          N/A

Dimensions:     125mm x 158mm

Weight:             1.03kg



20W Large Surface Mounted Square LED light fitting

Delivery and Returns

Free Delivery on orders over £60 applies to the UK ONLY


  • UK Standard Delivery              £3.90
  • UK Standard >£60                    FREE
  • UK Next Working Day *           £11.94 (Suspended At Present)
  • Europe /ROW                See Checkout

*For those who select next working day (Premium service) your orders get priority. Meaning we will ship them the same day as long as the order is received before 1300 on a work day (Mon-Fri). Orders received on a Saturday or Sunday will be dispatched on the Monday (excluding bank holidays), which means you will receive them following day.

** Excess Length Charge if £26.99 for fittings of 2m in length

Delivery Time

Nearly all orders are sent via courier, and a signature is required.

UK Standard or free delivery is about 3-5 days.

UK Next Working Day is the next working day

All European deliveries take 4-6 days.

Rest of world deliveries take around 6-8 days.

If your country is not listed please contact us for shipping and order placement on +44 1727 600102.

Backorders will be delivered as quickly as possible (Usually within 28 days) we will notify you by email of an expected delivery date.


  • All Anolis Fittings are built to order with a 4-6 week Lead time.  Please contact us to confirm delivery.

  • All Acclaim Lighting fittings are shipped direct from the factory, lead time is 10-14 days.  Please call us if you require urgently.

Delivery times are approximate, please do not book and trades until you have a confirmed delivery date, or have taken delivery.  We do not accept liability for any missed delivery dates, direct or consequential.   As per our terms and conditions.


We have a 30 Day return policy, however the good must be unused , in their original packaging and as new.

NOTE:  Not all products can be returned due to the hygienic nature of them, these will be identified in the product description.

Custom made or made to order are not returnable, creditable or exchangeable.

If you need to return something or the goods are faulty please contact us on 01727 600102 or email before sending anything.

We recommend using a tracked service for returns, please note we only pay return postage if the goods are proved faulty.

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At Sera Technologies we are proud to offer high quality products at a fair price, with many available for next day delivery.

Products have a Warranty of between 1 and 5 years, please see the product pages for detailed information.

All PPE has a minimum shelf life of 6 months, however most are years.

So rest assured that if you have a problem with any of our products we will sort it for you as quick as we can.

You can contact us by email, LiveChat or on the telephone.

You will require you original order details, if you did not purchase direct please contact your supplier for assistance.