Sunlight has gotten a lot of negative press; so much so that you have to wonder, is sunlight good for you. Let us see what the Bible, the ultimate authority, has to say. “And God said, Let there be lights in the firmament of the heaven to divide the day from the night; and let them be for signs, and for seasons, and for days, and years: And let them be for lights in the firmament of the heaven to give light upon the earth: and it was so. And God made two great lights; the greater light to rule the day, and the lesser light to rule the night: he made the stars also. And God set them in the firmament of the heaven to give light upon the earth, And to rule over the day and over the night, and to divide the light from the darkness: and God saw that it was good. And the evening and the morning were the fourth day.” Genesis 1:14–19. God said that the sunlight and the moonlight were good, so let’s see if we can identify what it is about sunlight that is good. 

Sunlight provides warmth for our planet and without it there would be no life. The energy from the sun supports chemical actions necessary for all life. It helps promote and regulate the oxygen and carbon dioxide levels in the environment and also affects the humidity and rain cycles. The sun disinfects and cleanses the environment by destroying bacteria, viruses and molds.  

Allowing the sun to shine directly in and around our homes has many practical benefits. “Shade-trees and shrubbery too close and dense around a house are unhealthy; for they prevent a free circulation of air, and prevent the rays of the sun from shining through sufficiently.” Selected Messages, Book 2, 463.


Fresh air and sunlight should be allowed to bathe our homes. It will prevent dampness and decrease bacteria that can cause sickness. The same thing can be said of the inside of our homes. Fresh air and sunshine help prevent dampness and bacteria and are especially important in our sleeping rooms. “Sleeping rooms, especially, should be well ventilated, and the atmosphere made healthful by light and air. Blinds should be left open several hours each day, the curtains put aside, and the room thoroughly aired.” Christian Temperance and Bible Hygiene, 57. 

Sunlight is now being used in the process of water purification. Chlorination kills many water-borne diseases, but the chlorine has certain carcinogenic effects. Researchers are now looking at irradiation with ultraviolet rays. Although not 100% effective, most water can be purified if allowed direct exposure to sunlight. The World Health Organization has said that exposing water in transparent bottles could save hundreds of thousands of lives a year in developing countries. This is a nearly cost-free process that will kill illness causing microorganisms in polluted water. The water should be placed horizontally in a transparent bottle, laid on a flat surface and then exposed to direct sunlight for about five hours.


With all of these benefits of sunlight, is it any wonder that God said it was good? “Truly the light is sweet, and a pleasant thing it is for the eyes to behold the sun.” Ecclesiastes

Janet Headrick