Headache & Migraine | CALM Green Lamp 520nm
£44.95
Blue and red light have both been shown to worsen migraine. Narrowband green light at 520nm is the only wavelength studied that reduces it.
Our CALM Green Lamp emits a precise narrowband 520nm green light with just 2.5% blue content – the wavelength University of Arizona research identified as the most tolerable for migraine and headache sufferers. Select “play icon” displayed on image for lamp in use.
CALM Green Light Lamp is used by:
- People with migraines (chronic and episodic)
- Headache sufferers (tension, cluster)
- People with photophobia and light sensitivity
- Office workers whose lighting triggers head pain
CALM Green Light Lamp Key features:
- Narrowband 520nm green light
- 3 brightness settings 25%, 50%, 100%
- Rechargeable Up to 18 hours runtime, USB Type-C
- 360° flexible gooseneck light exactly where needed
- Flicker-free, no glass, folds palm-size and travel-friendly
- Ultra-low blue light 2.5%
- Certified CE, RoHS, FCC – 2 Years Warranty
- Also available in Black
Bought Together
Blue and red light have both been shown to worsen migraine. Narrowband green light at 520nm is the only wavelength studied that reduces it.
Our CALM Green Lamp emits a precise narrowband 520nm green light with just 2.5% blue content – the wavelength University of Arizona research identified as the most tolerable for migraine and headache sufferers. Select “play icon” displayed on image for lamp in use.
CALM Green Light Lamp is used by:
- People with migraines (chronic and episodic)
- Headache sufferers (tension, cluster)
- People with photophobia and light sensitivity
- Office workers whose lighting triggers head pain
CALM Green Light Lamp Key features:
- Narrowband 520nm green light
- 3 brightness settings 25%, 50%, 100%
- Rechargeable Up to 18 hours runtime, USB Type-C
- 360° flexible gooseneck light exactly where needed
- Flicker-free, no glass, folds palm-size and travel-friendly
- Ultra-low blue light 2.5%
- Certified CE, RoHS, FCC – 2 Years Warranty
- Also available in Black
Blue and red light have both been shown to worsen migraine. Narrowband green light at 520nm is the only wavelength studied that reduces it.
Our CALM Green E14 Candle Bulb emits a precise narrowband 520nm green light with just 1.5% blue content – the wavelength University of Arizona research identified as the most tolerable for migraine and headache sufferers.
CALM Green Light Bulb is used by:
- People with migraines (chronic and episodic)
- Headache sufferers (tension, cluster)
- People with photophobia and light sensitivity
- Office workers whose lighting triggers head pain
CALM Green Light Bulb Key features:
- Narrowband 520nm green light
- Non-dimmable 3W, softer glow for evening and recovery use
- Flicker-free, low EMF
- E14 small screw candle fitting (UK / EU)
- Ultra-low 1.5% blue light
- Also available as E14 round bulb, E27 large screw, B22 bayonet
- CE, RoHS – 2 Year Warranty
Blue and red light have both been shown to worsen migraine. Narrowband green light at 520nm is the only wavelength studied that reduces it.
Our CALM Green Lamp emits a precise narrowband 520nm green light with just 2.5% blue content – the wavelength University of Arizona research identified as the most tolerable for migraine and headache sufferers. Select “play icon” displayed on image for lamp in use.
CALM Green Light Lamp is used by:
- People with migraines (chronic and episodic)
- Headache sufferers (tension, cluster)
- People with photophobia and light sensitivity
- Office workers whose lighting triggers head pain
CALM Green Light Lamp Key features:
- Narrowband 520nm green light
- 3 brightness settings 25%, 50%, 100%
- Rechargeable Up to 18 hours runtime, USB Type-C
- 360° flexible gooseneck light exactly where needed
- Flicker-free, no glass, folds palm-size and travel-friendly
- Ultra-low blue light 2.5%
- Certified CE, RoHS, FCC – 2 Years Warranty
- Also available in White
Description
CALM Green 520nm Lamp by CHIRYŌ Light Therapy
Our CALM Green lamp emits a precise narrowband 520nm green light, the exact wavelength used in the Arizona and Harvard research.
Blue light content is just 2.5% – far below standard household lighting (25-35%) and office lighting (around 45%), both of which are common migraine triggers.
Calm Green 520nm is a rechargeable, foldable to palm-sized lamp with a 360° flexible gooseneck and three brightness settings. Bright enough to read, write, work, and move around the house under.
The Clinical Findings of LED Green 520nm Lighting
In a 10-week clinical study, participants used narrowband 520nm Green Light exposure as part of their migraine management. Across the group:
- Headache days per month reduced by approximately 60% on average
- 86% of episodic migraine sufferers reported over 50% reduction in headache days
- 63% of chronic migraine sufferers reported over 50% reduction in headache days
- Participants also reported reduced photophobia, improved sleep, and reduced anxiety
(Lipton, Burstein et al., Frontiers in Neurology, 2023 — full reference below.)
Many of our customers tell us they’ve been able to switch off harsher overhead lighting altogether and use the CALM Green lamp as their primary light source during the afternoon, evening, headache episodes, and recovery.
Where to use the CALM Green Lamp
- During an active migraine, in a quiet room with overhead lights off
- As your primary lamp during the afternoon and evening when bright lighting becomes unbearable
- At your desk or home office when overhead office lighting is a known trigger
- Bedside, for reading and working in lower-stimulation light
- For children who experience frequent headaches or sensory aversion to bright lighting
- Travel – hotels, hospital stays, family visits where the lighting isn’t yours to choose
The lamp charges via USB Type-C (cable supplied) and runs up to 18 hours on a full charge at lowest brightness, or around 4 hours at full brightness. ABS+PC construction means no glass – safer and easier to travel with.
Q. Are all Green Light bulbs and lamps the same?
A. No. Most “green” bulbs and lamps on the market are tinted, coated, or colour-mixed, which means they still contain blue and other wavelengths that can make migraines worse. Our CALM Green is true narrowband 520nm – the precise wavelength used in the migraine research – with the lowest possible blue content and zero flicker.
Why Green Light 520nm Narrowband, and not Amber or Red, for Migraine and Headache Sufferers
If you suffer from migraines or chronic headaches, you’ve probably already realised that most lighting makes things worse. What’s less well known is that the colour of the light matters.
Migraine researchers including Dr Mohab Ibrahim (University of Arizona) and Professor Rami Burstein (Harvard Medical School) identified a specific neurological pathway – the retino-thalamo-cortical pathway – that connects vision directly to the brain circuits that produce migraine pain.
Through this pathway, narrow bands of blue light and narrow bands of red light both activate the photoreceptor cones (short- and long-wavelength cones respectively) that worsen headache. Narrowband green light at 520 ± 10nm activates a different set of cones (medium-wavelength) that ameliorate it.
In plain English: blue light triggers migraine. Red light also triggers migraine. Only narrowband green light has been shown to reduce it.
That’s why this lamp exists, and why it isn’t part of our Healthy Lighting ranges. Amber and red lighting are excellent for general healthy evening lighting and sleep, but for someone experiencing active head pain, they can be triggers rather than relief.
Q. Is this a medical device?
A. No. The CALM Green Lamp is general household lighting designed to support people whose head pain is triggered or worsened by standard lighting. It is not a medical device and is not intended to diagnose, treat, or replace any medication or clinical advice. For ongoing migraine management, please speak with your GP or neurologist.
Q. Can I use this lamp during an active migraine?
A. Yes – that’s one of its most common uses. The research protocol involved sitting in a darkened room with only the 520nm green light source for 1-2 hours (you can complete your usual task). The lamp’s brightness settings let you choose the level that’s most tolerable in that moment.
Q. How long does it take to see results?
A. The research studies typically ran for 8-10 weeks of daily exposure. Some people notice immediate relief during an active migraine; the reduction in frequency tends to build over weeks of regular use.
What’s in the Box
- 1 × CALM Green 520nm Lamp (White)
- 1 × USB Type-C charging cable
- 1 × User instructions
Clinical References for 520nm Narrowband Green Light
CHIRYŌ Light Therapy: Healthy Lighting FREE downloadable guide healthy lighting guide
Evaluation of green light exposure on headache frequency and quality of life in migraine patients Cephalalgia, 2020. First human clinical trial of green light therapy for migraine. 60% average reduction in headache days, with 86% of episodic and 63% of chronic migraine patients reporting over 50% improvement.
Narrow band green light effects on headache, photophobia, sleep, and anxiety among migraine patients Frontiers in Neurology, 2023. 181 migraine patients. Headache improved in 55% of all attacks treated, photophobia improved in 53%, sleep improved in 49%, anxiety improved in 34%.
Migraine photophobia originating in cone-driven retinal pathways Brain (Harvard Medical School), 2016. Identified the cone-driven retinal pathway behind migraine photophobia. Green light reduced pain by approximately 20%; blue and red light worsened it.
Green Light Exposure Improves Pain and Quality of Life in Fibromyalgia Patients Pain Medicine, 2021. Average pain intensity reduced from 8.4 to 4.9 on a 10-point scale during green light exposure compared with white light.
Green Light Therapy Shown to Reduce Migraine Frequency, Intensity University of Arizona Health Sciences, 2020. Plain-English institutional summary of Dr Mohab Ibrahim’s clinical research with lead-author quotes.
About CHIRYŌ Light Therapy
CHIRYŌ Light Therapy is a UK brand based in Bristol, specialising in blue-light-free home lighting and LED light therapy devices. The Healthy Lighting range was developed by a founder with approximately twenty years of professional experience in mental health and neurodivergence support, after seeing first-hand how rarely families are given practical, environment-based tools to support sleep and health.
In-home lighting consultations are available in Bristol and the surrounding area.
This product is general household lighting designed to support a low-blue-light evening environment. It is not a medical device and is not intended to diagnose, treat, or replace any medication or clinical advice.
Reviewed by CHIRYŌ Light Therapy May 2026 – Specialists in Healthy Lighting and FDA-cleared blue, red, and near-infrared LED light therapy devices.
Specifications
Rechargeable CALM Green 520nm Light Lamp (White)
- Lamp LED Colour: Narrowband Green (520nm)
- LEDs: 16
- LEDs Watt: 3W
- Light Lumens: 270lm at 100%
- Blue Light Content: 2.5%
- Operation: Touch Control (On, 3 brightness settings, Off)
- Brightness Settings: 25%, 50%, 100%
- Gooseneck: 360° flexibility
- Battery: 1800mAh Lithium-ion
- Charging: USB Type-C (cable supplied)
- Battery Operation: 4 hours at 100%, up to 18 hours at 25%
- Battery Charge Time: 2-3 hours
- Material: ABS+PC (no glass components)
- Finish: White
- Flicker: 100% Flicker-Free
- Warranty: 2 Years
- Certification: CE, RoHS, FCC
- Also Available In: Black
Additional information
| Weight | 0.350 kg |
|---|---|
| Dimensions | 45 × 14 × 45 cm |
| Colour | WHITE |
| Fitting Type |
Reviews (16)
16 reviews for Headache & Migraine | CALM Green Lamp 520nm
| 5 star | 68% | |
| 4 star | 31% | |
| 3 star | 0% | |
| 2 star | 0% | |
| 1 star | 0% |
Headache & Migraine | CALM Green Lamp 520nm
Q & A
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- Office workers whose lighting triggers head pain
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I suffer with frequent headaches from bright lighting, and this has been one of the few lights that feels comfortable to sit under for long periods.
[...]quick delivery easy to use and nice colour for the eyes!
[...]The Calm Green lamp is so relaxing! I’ve placed this lamp in my reading nook, and it’s perfect for unwinding with a good book. Excellent quality and very durable.
[...]creates a peaceful vibe in my living room. I use it every evening, though I wish it had a timer feature.
[...]Sleek design and easy to use. I love how simple and functional this lamp is. The green light is great for relaxation, and the portability is a big plus.
[...]