Light is the source of all life on our planet. The importance of light could be comprehended as plants synthesize nutrients from light using chlorophyll, and filter the air we breathe. Animals and humans depend on plants for survival. Therefore, everything depends on the light in some way.
The human body needs to be exposed to natural sunlight and its rhythm to function properly. The effects of light on endogenous production of vitamin D and melatonin are well known, as well as the role they play in emotional dysfunction such as SAD (Seasonal Affective Disorder).
During millions of years of evolution, man lived in a system strictly dependent on the climatic conditions that surrounded him. Social habits were strongly influenced by the seasonal rhythm and the time of exposure to natural sunlight. The expansion of artificial electric light, which began in the last century, finally allowed the independence of the natural photocycle.
The practical convenience of artificial light has led to underestimating the physiological implications of replacing daylight. Modern man not only lives in artificial environments but also is exposed to an immense amount of radiation from electromagnetic fields with different intensities from the planetary radiations to which man has been exposed for millions of years.
Light awakens nature, generates food for plants, and protects us from bad energy. Let’s discuss why do we need light in detail:
Importance of Light for your Health
One of the significances of light is it plays a major role in maintaining good health. The main factor controls our circadian cycle. This cycle is responsible for controlling our entire life. It controls the release of hormones in our body, even our brain nerves, and heartbeat. It also influences and controls our waking states and levels of consciousness.
Ensuring a good incidence of light in our environments can even have a positive effect on our mood, can influence the critical chemical reactions of our body, can reduce emotional problems (such as depression, for example), can improve the quality of our sleep, can make us healthier and immune to pain and even improve our productivity and job satisfaction.
The lack of light in our lives and in our environments, can cause disturbances in the production of melatonin, deregulate the release of growth hormone, cause a lack of vitamins (without sunlight our body does not synthesize vitamin D), it can impact the regulation of our metabolism, and it can also cause obesity, irritability, tiredness, etc…
Light and Photosynthesis
Have you ever wondered what is the importance of light reactions in photosynthesis? Plants need light to produce organic molecules ATP and NADPH necessary for the following dark reactions. Light energy takes up the whole process of photosynthesis when pigments absorb light. To process photosynthesis chlorophyll absorbs red and blue segments present in the white light.
Either way the answer to what is the importance of the light and dark reactions in photosynthesis? They require the light to produce organic energy molecules i.e., carbon dioxide, ATP, and NADPH in order to produce the product glucose.
The importance of the light-independent reactions in terms of carbon flow in the biosphere is also notable. The light reactions produce glucose –An important sugar generates from carbon dioxide CO2 gas.
Artificial lighting Importance
Artificial lighting can help you bring energy to your home, whether on cloudy and rainy days, at night, or even if your home simply does not have much access to natural light.
Having good internal lighting is essential to create a pleasant atmosphere and helps to enjoy a good life. Any dark spaces can be lit with the right lights to make every day feel like vacations in your home. Perhaps, the Christmas lights are what make the atmosphere of the house so special at this time of year. So, why not have that kind of feeling of relaxation and peace available in your home daily?
Try to choose lamps whose spectra of light are closest to sunlight. Look for lamps that have a Color Rendering Index greater than 80 (IRC> 80).
Choosing the right lamp determines whether the positive effect of artificial lighting has been achieved or not. The exterior spaces of the house, such as the garden, backyard, balcony, and all dark spaces, when properly lit, can transform the climate of the place, transforming it into a totally new and vibrant space.
Nowadays the importance of blue light glasses is also getting popular as they reduce the potential risk of eye damage. Moreover, it also improves the alarming symptoms of computer vision.
Light is so essential that generally, we realize this importance when faced with the lack of it. In a power outage, we look for something to be able to bring backlighting, be it with a candle, flashlight, or even a Smartphone.
Since the dawn of time, human beings have been looking for ways to illuminate the environment. The fire not only brought the heat to warm them and the opportunity to prepare food, but it also brought the chance to enter the unknown of darkness with enlightenment.
From that, we look for evolutionary ways to keep the light in our lives, with candles, lamps, or other admirable technologies, which over the years have become useful and indispensable.
The small lighting in a lamp frightens children, softer lighting creates environments that are considered peaceful, and a stronger light invigorates the mood in any situation.
The importance of light is both for living and nonliving organisms. The word light is so important that it already brings the feeling of something good. A well-lit environment brings safety, comfort, and increased traffic and productivity.