World's smallest mains smoke alarm


£123.49 ex VAT

Downlight integrated with the world’s smallest mains-powered smoke alarm. Designed to detect and invented to protect.

Blends in seamlessly for discreet but complete, fully fire-rated safety.

Connects wirelessly to our heat alarms to protect the entire home.

10-year sealed battery and back-up for safety that stands up.

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Designed to be heard but not seen.

The world’s smallest, mains-powered smoke alarm is designed to click inside our sleek, tapered-edged Downlight because we believe spaces can be safe and stylish. It blends in seamlessly and connects wirelessly to our heat alarms to make your home safe without compromising on aesthetics.



110V AC, 230V AC

Battery type

Non-replaceable CR2 10-year battery

Interlink frequency


Operating temperature

-10ºC to + 70ºC

Power consumption

161mAh in non-alarm condition


Audible indicator minimum 85dB @ 3 metres in anechoic successive tones


30/60/90 - Solid Joist 30 - Metal Webbed Joist & I-Joist



Complies to

BS 5839: Part 6 Grade D1

Product colour



Cut-out size








Important bits.

Here you can find all the information you need to achieve streamlined results.

Design files.

.RFA, .LDT, and .IES files to help streamline your design.

Install sheet.

Download the installation sheet for all our technical know-how.

Test certification.

All our official certifications, ready for you to download.


At Lumi-Plugin® we believe everybody deserves beauty and safety in their home.
We are proud of our almost non-existent failure rate which is why our smoke alarm comes with a 5-year guarantee.


  • What makes the Lumi-Smoke® alarm different?

    It’s the world’s smallest mains-powered smoke alarm with the option to integrate lighting, to keep your space bright, beautiful and most importantly- safe. We can do this by hiding all the technology behind our fully fire-rated chassis, keeping functionality in great working and great looking condition.

  • Is the Lumi-Smoke® alarm as safe as ordinary smoke alarms?

    Yes. All our products including our smoke alarm are fully accredited and certified by third-party regulators to ensure peace of mind across your entire home. Our smoke alarm is more discreet but no less complete, making your space safe and stylish.

  • Is it ok to have smoke alarms close to lights?

    Yes. There is a myth from traditional fittings that this is not possible. However, our smoke alarm plugin has been tested so the alarms detects and functions perfectly with or without the optional light fitting in place. If your electrician has any queries please get them to contact us on or +44 (0) 3303 801 329 and we will be happy to answer any questions they may have.

  • If the Lumi-Smoke® alarm fails or light fails do I have to replace the whole fixture?

    No. We’ve designed the product so you just replace the part you need. You can replace the smoke alarm here and the light source here. However, our light has a 5 year use non-stop life cycle or 50,000 hours and our smoke alarm has a 10 year life so you don’t need to worry about this for a while.

  • Where would I need a smoke alarm in my home?

    Depending on the level of protection your home needs you will typically require a minimum of x1 heat alarm in the kitchen and x2 smoke alarms covering your hallways and landing areas (means of escape). Your electrician will be able to advise you on this but we’re always happy to help too.

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