January 31, 2024

Shining a Light on Alzheimer's: The Benefits of Light Therapy

A closer look at the potential benefits of light therapy for Alzheimer's patients and how it can improve their quality of life.

Shedding Light on Alzheimer's Treatment

Alzheimer's disease, a progressive neurological disorder, induces memory loss, cognitive decline, and behavioral changes. Despite lacking a cure, researchers actively explore treatments, with light therapy emerging as a promising avenue.

In a recent meta-analysis by Qingui Meng from Weifang Medical University, light therapy exhibited significant benefits for Alzheimer's patients. Specifically targeting sleep disorders and psychobehavioral symptoms, it regulates the disrupted sleep patterns common in these individuals. Exposure to bright light during the day and dim light in the evening enhances sleep quality and overall well-being by effectively regulating the sleep-wake cycle.

Beyond its direct impact on brain function, light therapy indirectly benefits Alzheimer's patients by combating depression and improving mood. It fosters calmness and contentment, reducing agitation in affected individuals.

Promisingly, light therapy offers a non-invasive, drug-free treatment option for Alzheimer's disease. However, further research is required to understand underlying mechanisms and optimize implementation. With advancing technology and growing brain knowledge, the future of light therapy holds great promise for Alzheimer's patients.

The Link between Light Therapy and Alzheimer's

The meta-analysis included 15 randomized controlled trials involving older adults diagnosed with Alheimer's. Notably, improvements were observed in:

  1. Sleep Efficiency: Light therapy demonstrated a significant enhancement in sleep efficiency compared to usual care, indicating potential benefits for sleep disorders in AD patients.

  2. Psychobehavioral Symptoms: Light therapy outperformed usual care in reducing the severity of psychobehavioral symptoms, as assessed by the Neuropsychiatric Inventory (NPI).

  3. Caregiver Burden: The Zarit Caregiver Burden Interview (ZBI) revealed a significant reduction in caregiver burden, suggesting a positive impact on both patients and their caregivers.

  4. Depressive Symptoms: Light therapy alleviated depressive symptoms in AD patients, as evidenced by changes in the Cornell Scale for Depression in Dementia.

  5. Agitation: Light therapy proved to be more beneficial than usual care in improving agitated behavior in patients with AD, measured through the Cohen-Mansfield agitation inventory (CMAI).

While the link between light therapy and Alzheimer's is still under exploration, existing research offers promising evidence of its potential to improve the lives of Alzheimer's patients.

Lumitex's Perspective: Illuminating the Future of Phototherapy

At Lumitex, these recent findings truly excite us as they perfectly align with our unwavering commitment to harnessing the power of light for therapeutic purposes. With a mission to improve life with light, we see immense potential in the positive outcomes of further research into light therapy for Alzheimer's Disease. 

Our commitment to innovation extends beyond the current applications of light therapy. We're excited to explore new horizons, eager to contribute to the evolving landscape of therapeutic possibilities with the transformative power of light.


Light therapy has the potential to enhance overall well-being, improve sleep quality, regulate mood, and reduce agitation in individuals with Alzheimer's disease. It offers a promising non-invasive and drug-free treatment option with minimal side effects compared to pharmaceutical interventions. The findings from the meta-analysis suggest that light therapy holds promise as a treatment for Alzheimer's, and further exploration is warranted. 

As technology continues to advance and our understanding of the brain deepens, the future of light therapy for improving the lives of Alzheimer's patients looks bright. 


Meglio, M. Light Therapy Improves Sleep and Psychobehavioral Symptoms in Alzheimer Disease. Neurology Live. Published online January 23, 2024

Zhang L, Liu X, Li Y, et al. The effect of light therapy on sleep disorders and psychobehavioral symptoms in patients with Alzheimer’s disease: a meta-analysis. PLOS One. Published online December 6, 2023. 

Topics: Innovation, Light Therapy, Phototherapy

Lindsay Jankovic

Lindsay Jankovic

Lindsay Jankovic is the Marketing Manager at Lumitex. Passionate about showcasing the critical role of lighting in healthcare, Lindsay employs a variety of marketing strategies, from content creation and digital marketing to SEO and social media campaigns, to highlight innovations that enhance patient care and improve life with light.