Indoor sunlight, engineered for your body.

Brighter mornings. Sharper days. Deeper sleep.

Will Ahmed

Founder, WHOOP

Will founded WHOOP, the performance wearable used by elite athletes, teams, and organisations worldwide to measure strain, recovery, and sleep. His experience turning physiological data into everyday coaching helps ensure Sunday supports real-world performance, recovery, and wellbeing.

Professor Russell Foster, University of Oxford

Circadian Neuroscientist

Russell is a leading circadian neuroscientist and sleep researcher. His work on how specialised light-sensing cells in the eye set the body clock underpins modern understanding of how light affects sleep, mood, and long-term health, and informs how we engineer Sunday's daylight.

Indoor sunlight artificial skylight ceiling light in a Modern dining room with wooden table, chairs.

MEET SUNDAY LIGHT

A light designed for your body

Indoor light is a fraction of daylight. That gap creates flat mornings, afternoon slumps, and poor quality sleep.

Sunday Light brings daylight-level, high quality light into your home, working with your circadian system. Not against it.

Discover Sunday Light

01. Feels like sunlight

34,500 lumens of comfortable daylight across the whole room, water-cooled to run all day. Not a light box.

02. Feel it from day one

Up to 34,500 lumens of daylight-level brightness lifts mood, energy and focus.

03. In sync with the sun

Color shifts 6000K to 2650K automatically to anchor your body clock, for deeper sleep and easier travel.

04. True-to-life colour

CRI 95+ renders colour like real daylight, not the flat LEDs in most homes.

How it works

34,500

lumens

Full-spectrum light output

95+

CRI

Colour rendering index

2650-6000K

colour range

Warm evening light to midday daylight

Some notes on @thesundaylight, a sort of… artificial skylight?

It feels good to spend the day in daylight. But that doesn't happen when I'm working inside. Especially in the winter. So, for years, I've used super-bright LEDs while I work. They quite noticeably improve my energy…

i love how the @sesame sf office is always evolving between new art and art installations to new tech like this 34,500 lumen liquid cooled @thesundaylight thanks to @brendaniribe being on the lookout

The Sunday light is extraordinary. We change the light according to our mood; and our mood changes with the light. Way cool thing to get done!

daylight in the office from @thesundaylight

Nat Martin is the kind of builder I admire—his product feels like art, but it's also incredibly functional. In many ways, it reflects how I think about our work at Notion.

He's a Notion customer! And as of this weekend, I became his customer :)

I was incredibly impressed by the Sunday Light. It produces a level and quality of light that approximates sunlight, yet its design allows prolonged use that is both comfortable and convenient.

Critically, you do not have to sit next to the device to get the levels of light that will deliver physiological benefits.

It felt like being bathed in sunshine.

When Hammett turned it off, I laughed at the wintery greyness that replaced it. When he turned it back on, I appreciated it even more.

For SAD sufferers and those who hate the long winter evenings, half an hour beneath the Sunday should help banish the blues.

It is a gloomy Oxford winter but under our Sunday Light, it is astonishingly bright and cheery! This terrific piece of engineering solves an important problem - robustly and elegantly.

I'm looking into getting one of these. Looks like an incredibly cool product.

I can't believe the difference the light has made. It's like a beam of sunshine above our kitchen table. Every morning, I notice the immediate effect it has on me and my family's mood.

@natmart_in I've seen it! The cast is truly incredible. It really does feel like sunlight

This chandelier for circadian rhythms casts 10,000 lux at eye level, equivalent to ambient daylight, and outstripping the measly 500 lux found in most well-lit offices.

The science is clear that we need more light. The current options don't deliver. Sunday Light does.

The Sunday Light by Sunday Lighting in situ... at Otras Formas.

Dimmable LED light fixture in stainless steel and acrylic with titanium nano-particles

The Sunday Light's large reflective panel scatters light the same way that the atmosphere does. When the light is on, the light source mimics the sun, reflected as a bright white spot, and the surface of the panel glows with a luminous, sky blue light.

At the heart of the luminaire is an LED that produces over 34,000 lumens, cooled by water flowing throughout the structure.

At its brightest the Sunday Light creates the effect of standing under a clear blue sky on a sunny day. However deep dimming means that Sunday isn't just a sunlight machine - it can be as soft and soothing in the evening as it is powerful in the daytime, featuring a color changing light output, from bright daylight (6000 K, CRI 95+) to a warm evening light (2650 K), enabling perfect synchronicity with the sun.

Wow wow wow. It's so perfect. I'm just sat here admiring. It's just sublime. Cheering me up on a dreary day. It's totally energizing.

the closest thing to sunlight you can buy.

the sunday light uses titanium nanoparticles to scatter light the way earth's atmosphere does: actual blue sky on your ceiling, 34,500 lumens, water-cooled, 95+ CRI. just purchased one (prev deleted tweet said 'got' - to avoid any doubt, reposted, as I can't vouch yet for how well it works in practice). not sponsored, just stunned this exists.

At home

Better light. Better routines.

In the office

For energy, focus, performance.

In hotels & wellness spaces

Designed to restore, not drain.

Discover Sunday Light

"Sunday combines clever engineering with beautiful light in a rather beguiling way."

The Financial Times

Experience indoor sunlight

Handmade in London. Worldwide shipping via DHL Express. 3-year warranty.

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Indoor sunlight, engineered for your body.

Scientific and performance advisory board

Will Ahmed

Professor Russell Foster, University of Oxford

A light designed for your body

The Sunday Difference

01. Feels like sunlight

02. Feel it from day one

03. In sync with the sun

04. True-to-life colour

Wall of Love

Where Sunday Lives

At home

In the office

In hotels & wellness spaces

Experience indoor sunlight

Country/region

Indoor sunlight, engineered for your body.

Will Ahmed

Professor Russell Foster, University of Oxford

A light designed for your body

01. Feels like sunlight

02. Feel it from day one

03. In sync with the sun

04. True-to-life colour

At home

In the office

In hotels & wellness spaces

Experience indoor sunlight

Stay in the light

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