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Light, wellbeing & Performance

Octavio Perez, Adjunct Researcher at Mount Sinai Hospital NYC

Dr. Octavio L. Perez is a passionate professional, a researcher and a scholar who contributes to exploring, developing and bringing to the real world the benefits of light and lighting for human wellbeing and wellness, and ultimately health. He won the LpS Scientific Award 2018 and LED professional interviewed him about his work, HCL and the role of LED lighting.

LpS Best Papers
Lighting for elderly

Implications for Human-Centric Lighting Design in Tropical Nursing Homes

Light synchronizes our physiological and psychological rhythms to the 24-hour rhythm of the ambient changes. For the elderly, adequate environments to compensate for increasing frailty and sensory loss are crucial. A pilot study aimed to explore HCL design strategies in nursing homes in Singapore. Pre-/post implementation user surveys together with quantitative evaluations were conducted.

Research
LED lighting in medical applications

Flex LED Based Smart Light System for Healing of Chronic Wounds

Chronic wounds are notoriously challenging to treat, because they do not follow the typical healing process or time-frame. The resulting burden is significant, affecting over 40 million patients. Blue light is known for its anti-microbial and anti-inflammatory effects in the initial stages of the healing process. A smart, wearable system for blue-light treatment of chronic wounds has been developed and, for the first time, it has been demonstrated that blue-light illumination can offer much more than just antibacterial effects.

Technologies
Local voice control solution

Voice Controlled Lighting that Protects Privacy and Data

Intelligent lighting systems undoubtedly offer high comfort and energy efficiency. But especially conventional voice control systems like Amazon Alexa, Apple Siri or OK Google, with connected lamps and lighting fixtures are also becoming targets for uninvited guests. The benefits and technology of a new approach offering local voice control and artificial intelligence will be explained.

Applications
HCL for patient rooms and nursing homes

Healthy Light - LED Technology for Health- and Care-Applications

The right light at any time during the day or night is absolutely essential for health & wellbeing, especially in health and care applications. The article demonstrates why mimicking real daylight conditions with extended daylight curves, a direct and an indirect component (CCT 1.800–16.000 K), besides full spectrum and high color-rendering, are essential. It discusses the benefits for the medical staff, the patients and residents that can be derived from special colors.

Special Topics
Blue light issues

Melanopic Green - The Other Side of Blue

Numerous medical studies have shown that exposure to blue light at night suppresses the production of melatonin and so disrupts our circadian rhythms. It is therefore only common sense that we should specify warm white (3000 K) light sources wherever possible, also for street lighting. The article discusses if it is sufficient to only look at the CDT or if other wavelengths and aspects should be considered.

Special Topics
Blue light issues

Blue-Free Emitters for High-Quality Lighting with Low Circadian Disruption

Common levels of blue radiation are sufficient to disrupt the circadian cycle, calling for blue-depleted emitters in the evening. Most current solutions employ low-CCT and suffer from poor light quality. The authors introduce the main metric to measure the physiological effect of blue light: the melanopic lumen. They discuss its possible sources of inaccuracy related to the uncertainty in assessing the circadian action spectrum. Finally, the concept of a blue-free emitter with minimal melanopic lumen at very low CCT and how such spectrum providing a good light quality can be optimized is discussed.