Frequently Asked Questions
Benefits of bright light for health
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Why is bright light good for health?
Bright light is one of the most powerful signals your body uses to regulate sleep, mood and alertness. Regular bright light exposure, especially first thing in the morning, helps to align your body's internal clock ('circadian rhythm'), to regulate sleep-wake patterns.
Most indoor lighting is too dim to provide these signals. That’s why access to daylight, or daylight-level light, plays such an important role in how we feel and function.
Find out more about the benefits of bright light for health here.
How can bright light help Seasonal Affective Disorder (SAD)?
Seasonal Affective Disorder (SAD) is commonly associated with reduced daylight exposure during darker months. Research has consistently shown that bright light exposure at approximately 10,000 lux, improves mood and energy in people affected by SAD.
Sunday Light delivers this brightness naturally throughout indoor spaces, making it easy to get the light exposure you need as part of your everyday routine.
Learn more about bright light therapy and circadian health →
How is Sunday Light different to a smaller SAD lamp?
Most SAD lamps deliver high light intensity only at very close range, which typically requires sitting inches from a small device for a fixed period each day. This can make regular use feel like a separate task.
Sunday Light takes a different approach. It delivers daylight-level brightness across an entire room, allowing physiologically meaningful light to be experienced naturally as part of everyday life - while you work, eat, or move through a space. There’s no need to sit still or face a lamp.
In short, SAD lamps focus light on a person. Sunday Light builds daylight into the indoor environment.
How can bright light help my sleep?
Bright light helps regulate your body’s internal clock, known as the circadian rhythm. Exposure to sufficiently bright light during the day, especially in the morning, signals to your body that it’s daytime, which helps reinforce natural sleep timing at night.
Most indoor lighting is not bright enough to provide this strong signal. When daytime light exposure is too low or poorly timed, sleep can become lighter, later, or less consistent. Regular exposure to bright, daytime-appropriate light supports stronger day-night contrast, helping many people fall asleep more easily and wake feeling more rested.
Using the Sunday Light
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Why is Sunday Light different to a normal ceiling light?
Most ceiling lights are designed for visual comfort and decoration, not biological impact. They produce relatively low light levels and rely on air cooling, which limits how bright they can be used continuously.
Sunday is engineered from the ground up to deliver daylight-level brightness across an entire space. At these levels, brightness alone isn’t enough - the light must also be comfortable and usable over prolonged periods. Sunday solves these challenges through a combination of high-fidelity LEDs, atmospheric light dispersion, and a sealed water-cooling system.
By doing this, Sunday Light creates an environment which supports your mood, productivity and sleep as part of your everyday routine.
Where should I put my Sunday Light in my home?
Sunday Light is designed to be installed where you naturally spend time during the day, particularly mornings.
Common placements include above dining tables, kitchen islands, desks, or shared living spaces - areas where you sit, work, or gather regularly.
Because Sunday delivers daylight-level light across an entire space, it doesn’t need to be positioned directly above you or used in a dedicated room. The goal is to let bright light become part of your normal daily environment.
For specific placement guidance tailored to your space, contact us at enquiries@sundaylight.cc.
What is the ideal room size for Sunday Light?
Sunday Light works effectively in both small and large spaces. The key thing to consider is where you naturally spend time during the day, particularly in the mornings, so that you can get the most benefit from the light throughout the day.
For specific placement guidance tailored to your space, contact us at enquiries@sundaylight.cc.
Is there a minimum recommended ceiling height for the Sunday Light?
The typical minimum recommended ceiling height is 240 cm (94 inches). If you have a lower ceiling, please contact us in advance at enquiries@sundaylight.cc to discuss your space and we can advise on suitability.
Can you change the colour temperature of the Sunday Light?
Yes. Sunday Light features adjustable colour temperature, ranging from warm evening light (2650K) to cooler daytime light (6000K).
This allows the light to feel appropriate at different times of day - brighter and cooler when you want energy and focus in the morning, and warmer and softer as the day winds down. Colour temperature and brightness can be adjusted manually or scheduled to change automatically throughout the day.
How loud is the Sunday Light?
Sunday light is effectively inaudible in typical rooms. Maximum output is 25 dB(A) at 1 meter (significantly quieter than a typical refrigerator).
How much does it cost to run the Sunday Light?
At full brightness, Sunday Light uses approximately 400W, which equals roughly £0.09 per hour based on typical UK electricity rates. Running costs will vary based on your local electricity prices and usage patterns.
Can the Sunday Light be scheduled to turn on at certain times?
Yes. Sunday Light can be scheduled to turn on and off automatically at specific times, brightness levels, and colour temperatures using supported smart home systems.
This allows light to follow the natural rhythm of the day - bright and energising when you need it, softer and warmer as the day winds down - without manual adjustment.
Does the Sunday Light emit UV?
No. Sunday Light does not emit UV radiation.
Ordering & shipping
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How do I order a Sunday Light?
Order through our website or email enquiries@sundaylight.cc. Our team will guide you through the process and answer any questions.
How much does delivery cost?
Delivery time is 3-4 weeks from order. We ship worldwide via DHL Express. The shipping price will be shown at checkout.
Where is the Sunday Light made?
Every Sunday Light is handmade to order in our London workshop. Each unit is carefully built, tested, and finished with close attention to detail in our London studio, ensuring exceptional quality and performance.
Where can I see a Sunday Light in person?
You can experience Sunday Light at a growing number of locations across the UK, Europe, and the US. These include private homes, offices, and selected partner spaces.
A full list of current viewing locations is available here. If there isn’t a location near you, we may be able to arrange a private viewing on request.
Installation & delivery
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How difficult is the Sunday Light to install?
Installation is no more difficult than a typical chandelier of the same weight. Full instructions are provided with every unit, and our team is available for guidance.
Is Sunday Light water-cooled?
Yes. Sunday Light uses a sealed, water-based cooling system to support its unique high light output (34,500 lumens) while remaining quiet, stable, and comfortable for prolonged use.
The system is fully self-contained, requires no plumbing, and needs no user maintenance. It allows Sunday to deliver its unique daylight-level brightness within an indoor environment.
Does the light require plumbing in?
No plumbing is required. The water-cooling loop arrives prefilled with distilled water plus corrosion and anti-bacterial inhibitors. The system is fully sealed and requires no topping up or maintenance.
The installation process is the same as installing a chandelier of similar weight (22kg).
Can the Sunday Light be controlled by my smart home platform?
Yes you can connect to your smart home platform. Please reach out to us regarding specific questions on how we integrate with smart home platforms.
Still have questions?
We're here to help. Reach out to our team and we'll get back to you as soon as possible.
Experience indoor sunlight
Handmade in London. Worldwide shipping via DHL Express. 3-year warranty.