Shedding Light on Winter Blues: Can Red and Infrared Light Therapy Support Your Mental Health?

Disclaimer

The information provided in this article is intended for informational purposes only and should not be construed as medical advice. It is not intended to diagnose, treat, cure, or prevent any condition. Always consult with your general practitioner or other qualified healthcare professional before starting any new treatment or therapy.

A Natural, Gentle Approach to Boosting Mood

As the vibrant colours of autumn fade and the days grow short, many of us feel a subtle shift in our mood and energy. For some, this is a mild inconvenience; for others, it can be a profound and debilitating slump known as Seasonal Affective Disorder (SAD). Could red and infrared light therapy be a solution?

At our New Zealand-owned and operated business, we have dedicated ourselves to making high-quality LED light therapy accessible. Having seen the remarkable results of red and infrared light therapy firsthand, we now offer a trusted range for people, pets and their equine companions.

In this article, we’ll explore the science of SAD and investigate how specific wavelengths of light might offer a beacon of hope during the darker months.

Understanding SAD: More Than Just the Winter Blues

Seasonal Affective Disorder is a type of depression that follows a seasonal pattern, typically emerging in the autumn and winter months and resolving in the spring. It’s far more significant than simply disliking cold weather. People with SAD experience genuine depressive episodes that can drain their energy and make them feel moody and lethargic.

Common symptoms of SAD include:

Persistent low mood, sadness or hopelessness
Loss of pleasure or interest in everyday activities
Irritability and feelings of despair
Lethargy and a lack of energy during the daytime
Sleeping excessively (hypersomnia) and finding it hard to get up
Craving carbohydrates and gaining weight
Difficulty concentrating

The primary driver of SAD is the reduced exposure to sunlight during winter. This disrupts our internal body clock, which regulates sleep, mood and hormones. Harvard Health explains that a lack of light throws off our circadian rhythm, causing the brain to produce too much of the sleep hormone melatonin and too little of the “feel-good” chemical serotonin, leaving us feeling low and drained. This disruption can affect up to 5% of the population, with symptoms lasting roughly 5 months a year.

How Does Light Therapy Work? A Biological Approach

Conventional light therapy has been a first-line treatment for SAD for decades. Standard treatment usually involves sitting in front of a bright white light box (10,000 lux) for 30 minutes each morning. The NHS notes that this type of treatment can help regulate the production of melatonin and serotonin.

Key mechanisms of light therapy on the brain:

Regulating the Circadian Rhythm: Light is the primary signal for our internal clock. Morning light helps shift our sleep-wake cycle back to a normal phase, combatting the winter delay.
Suppressing Melatonin: Light signals the brain to stop producing melatonin, the hormone that makes us sleepy, helping us to feel more alert during the day.
Boosting Serotonin: Exposure to light can increase serotonin production in the brain, helping elevate mood and restore a sense of well-being.

A significant network meta-analysis published in 2024 in the Journal of Affective Disorders analysed 21 clinical trials involving 1,037 participants. It concluded that bright light therapy is a “promising” and “statistically significant” treatment for alleviating the symptoms of SAD.

The evidence supporting light therapy is so robust that it is often compared to the effectiveness of antidepressant medication or talking therapies.

From Bright White to Red & Infrared: A New Contender

While white light boxes are the standard, recent years have seen a surge of interest in red light therapy (often referred to as photobiomodulation). Unlike the bright, glaring light of a SAD lamp, red light therapy delivers specific wavelengths (typically in the 630–850 nanometre range) that are gentle on the eyes and designed to interact deeply with our cells.

How red light therapy differs:

Glare-Free: The light isn't designed to wake you up through your eyes; it works on the tissues.
Energy Focused: It penetrates the skin and is absorbed by the mitochondria—the power plants of our cells.
Systemic Effects: It enhances cellular energy production, reduces inflammation and improves circulation in targeted areas.

But can this “cellular energy” affect our mood? Emerging research suggests yes. A recent review examining fourteen studies up to July 2025 concluded that Photobiomodulation (PBM) has “therapeutic potential” for mental health issues, including SAD, with reported improvements in brain activity and antidepressant effects.

What the Research Says: Infrared's Surprising Advantage

One of the most fascinating findings in this field challenges the assumption that you need visible white light to treat SAD. A groundbreaking study, Prophylactic treatment of seasonal affective disorder (SAD) by using light visors, investigated whether light had to be visible to be effective. The study involved 38 SAD patients who started treatment in early autumn to try to prevent winter depression.

The groups were exposed to:

Bright white light
Infrared light (which is invisible to the human eye and was measured at only 0.18 lux)
No light (control group)

The results were remarkable: Infrared light was just as effective as bright white light. Both were significantly more effective than doing nothing. The authors noted that the fact that invisible infrared light worked as well as bright light “questions the specific role of visible light in the treatment of SAD”.

This suggests that the therapeutic benefits of light may not simply be about visual stimulation or circadian signalling, but also about the direct biological effect of infrared wavelengths on the body’s cells.

Exploring the Potential: Red Light and Mood Regulation

While the above study used infrared, what about the red wavelengths often found in home-use panels? Though more research is needed specifically for SAD, several trials on general depression and cellular health are promising.

Daily Sessions Improve Mood: A 2019 clinical trial found that daily 20-minute near-infrared light sessions directed to the forehead significantly improved mood scores among participants with mild to moderate depression. Using a similar transcranial approach, a 2017 pilot study reported improved mood and cognitive performance in healthy adults after just two weeks.
Rapid Response: A 2012 study published in the Journal of Nervous and Mental Disease looked at rapid effects. Patients with SAD received one hour of bright light and one hour of placebo red light. Even after a single session, there was a “significant but modest improvement” in depression scores with the active light—demonstrating that light can work very quickly to lift mood.
Cellular Energy and Brain Function: Researchers suggest that light therapy may influence levels of Brain-Derived Neurotrophic Factor (BDNF), a protein crucial for neuron health and neuroplasticity. By stimulating mitochondria, red light may help improve energy availability for brain cells, counteracting the chronic low energy that characterises depressive states.

A 2025 systematic review and network meta-analysis comparing white, blue, green, and red light noted that, based on the current literature, red light may show a strong placebo effect. The review indicated that white light appears most effective, followed by green and blue.

However, this does not negate the potential value of red light, especially given its unique mechanism of acting through the body rather than the eyes, and the strong findings from the infrared visor study suggesting that invisible light wavelengths are powerful agents against SAD.

Choosing the Right Red and Infrared Light Device for SAD

Experience the full potential of red and infrared light therapy for SAD. Our devices use scientifically optimised red and near-infrared wavelengths to help ease symptoms.

All devices are AU/NZ safety certified, locally supplied, and designed for effortless daily use.

LUMINETTE 3 LIGHT THERAPY GLASSES

Experience the life-changing benefits of clinically proven light therapy in a lightweight, wearable visor. When sunlight is scarce, your brain produces excess melatonin, leading to fatigue, low mood and disrupted sleep. Luminette stops melatonin secretion and promotes serotonin release, helping you beat the winter blues, boost energy and regulate your body clock. Wear it like a pair of sunglasses for 20 minutes while you go about your day.

Key Benefits:

Clinically Effective Wavelength: Emits blue-enriched white light peaked at 468nm – scientifically proven to be the most effective at simulating sunlight, without harmful wavelengths below 450nm.
Regulates Your Circadian Rhythm: Reprogrammes your internal body clock by mimicking the sun's synchronising effects, helping you fall asleep earlier or later to fit your schedule.
Fights Fatigue & Low Mood: Stops melatonin production and triggers serotonin release, relieving jet lag symptoms such as insomnia, sleepiness, and physical and intellectual fatigue.
Ultra-Light & Comfortable: Weighs just 68 grams, with a comfortable, glasses-like fit that won't obscure your vision. Works perfectly over prescription glasses or contact lenses.
Wearable & Convenient: Unlike stationary light boxes, you can wear Luminette while doing household chores, working at your desk, or moving around – no need to sit still.
Year-Round Energy Support: Ideal for combating Seasonal Affective Disorder (SAD), jet lag, shift work sleep disorders, or simply improving winter mood and alertness.

Good to know: Luminette uses innovative optical technology that directs a natural light beam into your eyes without glare or dazzling. The white light is enhanced with blue light for maximum effectiveness, but the LEDs are specifically selected to avoid wavelengths below 450nm, emitting only beneficial light. For best results, wear at the same time each morning, typically for 20–30 minutes.

Always consult your GP before starting any light therapy if you have an eye condition or are taking photosensitising medication.

LIGHTFORCE BLUE, RED & NEAR INFRARED LED LIGHT 50 x 24 CM CANOPY/PAD

Designed for comprehensive, full-spectrum wellness, the LightForce Blue, Red & Near Infrared Flexible Pad offers the ultimate in at-home photobiomodulation. Featuring an expansive 50 x 24 cm treatment surface with 200 advanced triple-chip LEDs, this device delivers three distinct therapeutic wavelengths, Blue (470nm), Red (630nm), and Near Infrared (850nm), in a single, versatile panel.

Whether used as a flexible body wrap for deep-tissue relief or as a freestanding canopy for facial rejuvenation, this device provides a complete solution for pain management, skin health, and recovery.

Key Benefits:

Advanced Triple-Spectrum Technology: Equipped with 200 high-output triple-chip diodes, delivering simultaneous emission of Blue (470nm), Red (630nm), and Near Infrared (850nm) light. This powerful combination addresses everything from surface-level skin clarity and collagen production to deep musculoskeletal pain and inflammation.
Versatile 2-in-1 Design: The ultra-flexible pad construction moulds comfortably around joints, limbs, and the torso for targeted therapy. Included acrylic stands transform the pad into a hands-free canopy, ideal for treating the face, neck, and décolletage without holding the device.
Blue Light (470nm) for Clarity & Calm: Targets the skin's surface to help eliminate acne-causing bacteria without damaging surrounding tissue. Also beneficial for addressing sun damage, fungal concerns, sun spots, and the redness associated with rosacea.
Red Light (630nm) for Rejuvenation & Tone: Stimulates cellular activity in the epidermis to help reduce the appearance of fine lines and wrinkles, improve overall skin smoothness, and encourage a more even skin tone. This wavelength is also studied for its potential to revitalise hair follicles and support natural hair regrowth.
Near-Infrared Light (850nm) for Deep Healing: Penetrates through skin, muscle, and tissue to reach bones and joints. This deep action helps improve circulation, reduce inflammation and oedema, accelerate injury recovery, and support bone repair while promoting the release of endorphins for natural pain relief.
Complete Treatment Kit: Includes protective eyewear for safe operation during facial treatments, a durable Velcro elasticised strap for securing the pad to the body, and two acrylic stands for a stable canopy configuration.
Flexible Power Options: Operates conveniently by connecting directly to mains power or via the included USB cord. For complete portability, connect the pad to a USB 5V 3A power bank (available separately) to enjoy wireless freedom anywhere.

Good to know: The Near-Infrared (850nm) diodes will appear dim or unlit to the naked eye; this is normal and indicates deep-penetrating therapeutic energy is being delivered effectively.

Always wear the supplied protective eyewear when using the device in canopy mode or when looking towards the light source. The soft PVC cover is designed for easy cleaning and maximum light transmittance.

Harnessing Light to Support SAD

Red and near-infrared light therapy offers a powerful, science-backed way to support your body's natural mood and energy regulation during the darker months. While it is not a replacement for medical treatment, it is an advanced, non-invasive technology that works at a biological level to help reset your circadian rhythm, boost serotonin production, and combat the fatigue and low mood associated with Seasonal Affective Disorder.

Ready to Support Your Natural Mood and Energy Balance?

Explore our premium Red & Near-Infrared Light Therapy range, designed to help alleviate the winter blues, improve sleep quality, and naturally boost your energy levels. Featuring clinically relevant wavelengths (including near-infrared at 810–850nm), our devices bring professional-grade photobiomodulation into the comfort and privacy of your home.

We are proudly New Zealand-owned and operated, specialising in:

✔ Research-Backed Mood Support: Genuine technology supported by studies showing that infrared light can be as effective as bright white light in preventing SAD symptoms, working through cellular energy pathways rather than just visual stimulation.
✔ Effective Circadian Reset: Honest, expert guidance on using light therapy to help regulate melatonin production, synchronise your internal body clock, and improve sleep-wake cycles – all without disrupting your daily routine.
✔ High-Quality, Safe Devices: Designed for effective, convenient at-home use, delivering optimal therapeutic energy without harmful UV rays, excessive heat, or harsh glare. Gentle enough for daily morning use.

Experience the power of photobiomodulation. Support your body's innate ability to regulate mood, restore energy, and sleep better – naturally.

Shop our range or get in touch to take the next step in your winter wellness journey.