Light Pollution and Circadian Misalignment: A Healthy, Blue-Free, White Light-Emitting Diode to Avoid Chronodisruption.

Amador Menéndez-Velázquez,Ana Belén García-Delgado,Dolores Morales

doi:10.3390/ijerph19031849

Amador Menéndez-Velázquez, Ana Belén García-Delgado + Show 1 more

Open Access

https://doi.org/10.3390/ijerph19031849

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Abstract

Sunlight has participated in the development of all life forms on Earth. The micro-world and the daily rhythms of plants and animals are strongly regulated by the light–dark rhythm. Human beings have followed this pattern for thousands of years. The discovery and development of artificial light sources eliminated the workings of this physiological clock. The world’s current external environment is full of light pollution. In many electrical light bulbs used today and considered “environmentally friendly,” such as LED devices, electrical energy is converted into short-wavelength illumination that we have not experienced in the past. Such illumination effectively becomes “biological light pollution” and disrupts our pineal melatonin production. The suppression of melatonin at night alters our circadian rhythms (biological rhythms with a periodicity of 24 h). This alteration is known as chronodisruption and is associated with numerous diseases. In this article, we present a blue-free WLED (white light-emitting diode) that can avoid chronodisruption and preserve circadian rhythms. This WLED also maintains the spectral quality of light measured through parameters such as CRI (color reproduction index).

Highlights

In 1609, Galileo Galilei pointed a telescope at the night sky
We developed a blue-free white light-emitting diode (WLED) to avoid chronodisruption while maintaining high quality light parameters, such as the color rendering index (CRI)
We present a study of WLEDs using organic fluorescent dyes to replace the conventional phosphor

Summary

Introduction

In 1609, Galileo Galilei pointed a telescope at the night sky. His inspection of the pathways of stars and planets brought new and profound knowledge of celestial movement.His discovery that the Earth is not the center of the universe propelled revolutions in science and religion [1].Galileo’s telescopic discoveries, and the cultural commotion they caused, were remarkable. In 1609, Galileo Galilei pointed a telescope at the night sky. His inspection of the pathways of stars and planets brought new and profound knowledge of celestial movement. His discovery that the Earth is not the center of the universe propelled revolutions in science and religion [1]. Galileo’s telescopic discoveries, and the cultural commotion they caused, were remarkable. Galileo’s night sky was no less spectacular than his discoveries. Story of the Invention of Efficient Blue InGaN Light Emitting Diodes (Nobel Lecture). T.; Demir, H.V. Color Science of Nanocrystal Quantum Dots for Lighting and Displays.

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