News & Information

Light, Sleep, Brain Health, Circadian Rhythm, and the Indoor Environment Are the Missing Foundations of Employee Well-Being

Most workplace wellness programs begin with good intentions. They usually encourage movement, nutrition, hydration, stress management, meditation, mental health support, and healthier habits. These all matter, but they often miss the environmental signal that silently shapes every one of these behaviors: light.

The human body does not experience light as simple brightness. Light is biological energy and information. It reaches photoreceptors in the eyes and skin, and it influences the nervous system, mitochondria, blood vessels, hormones, immune system, and circadian clock. It helps the brain know when to wake, focus, digest, repair, and sleep.

This is why workplace wellness can no longer be separated from the lighting choices within the indoor environment.

For most of human history, our days were shaped by sunrise, full spectrum daylight, the changing angle of the sun, infrared-rich natural environments, sunset, darkness, and sleep. Morning outdoor light helps anchor the circadian clock. Midday light supports alertness and biological activation. Evening light gradually softens and red shifts so the nervous system can move toward recovery. Darkness at night allows melatonin, deep sleep, tissue repair, and immune regulation to occur. 

Modern indoor lighting often does the opposite: too dim during the day to strongly support circadian activation, yet too bright and blue-enriched at night to support sleep. For employees, this can show up as eye strain, afternoon crashes, poor sleep, low mood, reduced focus, and a nervous system that never fully shifts into recovery.

This does not mean lighting is a treatment for disease. It means the human body is light responsive, and indoor environments should be designed with that reality in mind.

Why Infrared Belongs in the Conversation

When people talk about light and health, they usually focus on blue light. That conversation is important, but incomplete.

Natural sunlight does not deliver blue light alone. It delivers visible light alongside red and infrared wavelengths. In nature, the more stimulating parts of the visible spectrum are always accompanied by longer wavelengths that interact with tissue, water, circulation, and mitochondria.

Red and near-infrared light are widely studied under the field of photobiomodulation. Research reviews  describe how red and near infrared light can interact with mitochondrial enzymes such as cytochrome c oxidase and influence nitric oxide, ATP, calcium signaling, reactive oxygen signaling, and cellular metabolism.

Infrared is also deeply connected to water biology. Work from Gerald Pollack’s laboratory has explored how infrared energy can expand the exclusion zone of structured water near hydrophilic surfaces. From a practical wellness perspective, this points to a broader idea: The body is not only biochemical. It is also aqueous, electrical, and photonic. Water, fascia, blood flow, cell membranes, mitochondria, and connective tissue are all part of the light environment.

A Brief History of Corporate Office Lighting

Today, many people spend the majority of their day indoors under artificial lighting that is bright enough to see by, but biologically incomplete.

In the early 1900s, corporate and commercial spaces relied mostly on incandescent lighting. This light was inefficient, but it was warm, red rich, and infrared rich. By the 1950s, fluorescent tube lighting became widespread throughout workplaces because it produced more visible light for less power. In the 1960s, fluorescent troffers became the standard look of the modern office. Uniform brightness, productivity, and efficiency were prioritized over spectral quality.

From the 1970s onward, energy concerns accelerated the push toward efficient fluorescent and then LED lighting. By the 2010s, LED panels, strips, and recessed fixtures had become dominant across offices, malls, airports, hospitals, schools, and most indoor environments.

Each step improved energy efficiency but reduced the red and infrared richness that was present in firelight, incandescent bulbs, halogen bulbs, and sunlight. No light is inherently harmful or beneficial by itself. The better question is whether the ratios, timing, and spectrum match the conditions human biology evolved under.

The result is a mismatch: darker days, brighter nights, more screen exposure, less outdoor light, less infrared, and more circadian confusion.

A Monash University–led study, published in Nature Mental Health, examined more than 85,000 people and found that greater night time light exposure was associated with increased risk for several psychiatric disorders, while greater daytime light exposure was associated with reduced risk for several outcomes.

This makes the workplace relevant. Employees are affected not only by food, movement, and stress management, but by the lighting environment they sit under every day.

The positive news is that companies are starting to pay attention. Human centric lighting systems now change color temperature throughout the day, moving from warmer morning light toward brighter midday light and back again. This is a step in the right direction, but one major element is still missing: infrared.

Sunlight contains about 45% broadband infrared all day long. Firelight contains over 80% infrared. Incandescent, halogen, and kerosene lamps also preserved over 45% infrared. And most LEDs contain none or very little. It is no surprise the red and infrared light industry is growing quickly across skin health, pain, athletic recovery, sleep, and brain health. But there may be a simpler idea: reintroduce infrared back into everyday indoor lighting in an energy-efficient form.

A Case Study: Japa Health Hot Yoga Center in Land O Lakes, Florida

One example of a forward-thinking indoor wellness space is Japa Health, a yoga center in Land O Lakes, Florida.

Japa Health installed approximately 40 BioSpectral BioLux A19 full-spectrum broadband infrared-enriched bulbs in its studio environment. The goal was not simply to make the room brighter. The goal was to create a lighting environment that better matched the rhythm and feeling of nature throughout the day.

During the middle of the day, classes can be held under a fuller spectrum mode with visible light and broadband infrared, creating a brighter environment for movement, mood, alertness, and physical engagement.

As the day progresses, the teacher can gradually dim the lights. Unlike conventional bulbs that only reduce brightness, this lighting approach allows the room to move toward a warmer evening spectrum. Later afternoon and evening classes can shift closer to an incandescent or candlelight style environment, rich in amber, red, and infrared tones.

For yoga, this matters. A class is not only muscular. It is neurological, fascial, emotional, respiratory, and circadian. The light in the room helps shape the state of the nervous system. A harsh overhead light can make the body adopt a guarded biochemical strategy. A warmer light spectrum with abundant broadband infrared in the environment can nourish more fluid movements and feel safer, softer, and more restorative.

In practice, the studio has reported a more enjoyable class atmosphere, strong participant satisfaction, better mood during sessions, and a sense that the environment supports movement rather than fighting it. While these observations are not clinical trial data, they are the kind of qualitative feedback workplace wellness leaders should pay attention to. People know when a room feels good.

Why This Matters for Workplaces

The same principles apply beyond yoga studios.

Offices, clinics, conference rooms, wellness rooms, schools, hotels, gyms, and corporate spaces all use light as an invisible management system. Most buildings still manage light for visibility and energy codes, not biology.

A biologically intelligent lighting strategy asks better questions. Does the space support daytime alertness, reduce eye strain, balance blue-enriched light with red and infrared, and help people transition into recovery at night?

This matters because sleep is not separate from work. Poor sleep affects mood, metabolic health, immune resilience, decision making, reaction time, focus, pain sensitivity, and emotional regulation. A wellness program that ignores light may be trying to solve downstream symptoms while leaving the upstream environment unchanged.

The Next Generation of Healthy Buildings

Better light does not require every building to become complicated. It begins with a simple principle: brighter, fuller light during the day, warmer light in the evening, less blue-enriched light at night, more access to outdoor light, and more respect for red and infrared wavelengths indoors.

BioSpectral’s BioLux range was created around this principle, beginning with A19 bulbs and expanding into recessed can downlights for homes, clinics, wellness spaces, and workplace environments. The aim is to help indoor spaces move beyond commodity lighting and toward lighting that supports human biology.

This is not about turning every office into a clinic. It is about recognizing the indoor environment as part of the wellness program.

A workplace can offer the best nutrition education, meditation apps, step challenges, and mental health workshops available. But if employees spend all day in biologically poor light, stare into screens, miss the sun, and return home to bright artificial light at night, the body receives conflicting instructions.

Better workplace wellness starts when we stop treating the building as neutral. The room is participating. The light is participating. The nervous system is listening. The future belongs to organizations that understand health is shaped by both behavior and environment.