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Colour Rendering Index

Colour Rendering Index (CRI) is a measure out of 100 that determines how accurately a light source shows colours of illuminated objects when compared to natural light.


Give your eyes what they need

  • See Colours in True Light See Colours in True Light See Colours in True Light

    See Colours in True Light

    Depending on the light source you use, colours may either appear true to life or washed out. This is determined by the Colour Rendering Index (CRI).

    A light with a high colour rendering score will make it much easier to distinguish between navy blue and black thread, for example. If illuminated by a light with a lower score, it will be harder to discern between different shades.

    This should be a key consideration if you enjoy a hobby of which colour is a key component.

  • Bring Daylight Indoors Bring Daylight Indoors Bring Daylight Indoors

    Bring Daylight Indoors

    The Serious High Definition Light is as close to daylight as is technically possible with a CRI of 99/100, mirroring the daylight spectrum.

    Our High Definition Light sources have been used to bring out the fine colour hues at the Van Gogh museum and by many passionate painters to illuminate their work.

    We recommend the High Definition Light when fine details matter as it offers the best clarity of any Serious Light.

  • How do I choose the right light? How do I choose the right light? How do I choose the right light?

    How do I choose the right light?

    Serious Lights use specialist technology to shine daylight indoors, projecting a warm white beam of 3,500-4,000K that is kinder to the indoor eye. We have found after decades of user feedback that this is the optimum specification to allow you to read in comfort for longer.

    High Definition and Alex Lights use bespoke technology to get as close to daylight as is technically possible, and are recommended if you enjoy hobbies involving colour. The Classic Light does not benefit from the same similarity to the daylight spectrum, but offers a softer, focused beam for book reading.


The Serious Difference

  • 30 Day Trial

    30 Day Risk-Free Trial

    Free UK Mainland Collection

  • Great Britain

    Hand-Built in Great Britain

    Made in Aylesbury

  • Daylight Wavelength Technology

    Bring Daylight Indoors

    Daylight Wavelength Technology™

  • 5 Year

    5 Year Warranty

    Peace of Mind

Customer Reviews

  • 5 stars

    I can distinguish subtle differences of shade in otherwise similar colours.

    Mr Griffiths, London

  • 5 stars

    I can see the colours of my tapestry work on a dark winters evening.

    Mrs Kilpatrick, Gloucestershire

  • 5 stars

    The light improves the definition of colours, despite having suffered glaucoma for many years.

    Mrs Clark, Devon


Our Best Reading Lights

High Definition Floor Light

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High Definition Floor

Perfect for you if...

  • You're an avid reader
  • You enjoy a hobby with fine detail
  • You have an eye condition
  • You want the best possible light


Suitable For

  • Reading books
  • Reading larger publications (magazines, newspapers)
  • Hobbies involving colour (artwork, needlework)
  • Hobbies requiring wide beam (music, jigsaws)
  • Eye conditions(AMD, Cataracts, Glaucoma)
From £399.99
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High Definition Table Light

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High Definition Table Light - Heavyweight

Key Features

  • Cutting edge LED technology
  • Closest to natural daylight
  • Adjustable beam width
  • Intuitive dimming function
  • Even small print is crisp and clear


Suitable for

  • Reading books
  • Reading larger publications (magazines, newspapers)
  • Hobbies involving colour (artwork, needlework)
  • Hobbies requiring wide beam (music, jigsaws)
  • Eye conditions(AMD, Cataracts, Glaucoma)
From £349.99
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Alex Floor Light

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Alex Floor Light Black

Key Features

  • Energy efficient LED
  • Close to natural daylight
  • Wide beam pattern
  • Fully dimmable
  • Bright, white light beam


Suitable for

  • Reading books
  • Reading larger publications (magazines, newspapers)
  • Hobbies requiring wide beam (music, jigsaws)
From £299.99
Order Now