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More than just visual effects (image, shape, intensity, perception, contrast, etc.); Light also has biological and psychological effects that can impact the health and wellbeing of humans.

When light biologically impacts us, it can improve or disrupt our sleep, cognition and overall well being. It can improve mood and stabilize our circadian rhythms, helping us get a better and deeper night’s sleep. Psychologically, light can decrease depression scores and even increase cognitive performance such as reaction time and activation.

Yellow is frequently thought to be a high-energy colour. It's frequently employed in circumstances and items that aim to elicit a feeling of excitement or energy. It's bright and catches the eye right away. Its energy may be bold and powerful, or it may be fresh, strong, and overpowering.

"How wonderful yellow is. It stands for the sun." -Vincent Van Gogh

Yellow is a bright and joyful colour for many people. Advertisers may utilize it to not only get people's attention, but also to make them feel good. The colour yellow exudes brightness, light, vitality, energy, optimism, willingness to grow and outshine. Sun stars and sunflowers are the objects that most are associated with the colour yellow.

How does yellow make you feel? Do you associate yellow with certain qualities or situations?

While the color yellow may elicit a variety of psychological responses, it's crucial to realize that these emotions are typically individual. Other associations are frequently cultural and even unique to each individual as a result of their diverse origins and experiences.

Blue light is one of the visible color spectrum's colors that, when combined, make white light. The wavelength, frequency, and energy level of each hue in the light spectrum are all distinct. Violet light is the shortest wavelength in the visible color spectrum, measuring roughly 400 nanometers (nm), whereas red light has a wavelength of 700 nm.

Blue light has short wavelengths between 450 and 495 nm and is high in energy and frequency. During the day, blue light is mostly emitted by the sun, but it is also emitted by fluorescent lights and light-emitting diodes (LED).

One of the most influential environmental variables on our brain is light. Our brains respond to blue light the most out of all the colors in the spectrum. The presence or absence of light has a significant impact on the maintenance of a regular circadian rhythm, which is a process in which our brain regulates biological processes and behaviors that are critical for optimal health.

Blue light has been shown to have a negative impact on mental health by interfering with how our brain controls mood, emotions, and sleep. The obvious positive influence of light on our mood is a boost in our spirits in reaction to a sunny day with vivid blue skies. Blue light, the hue with the most energy in the visible color range, is principally responsible for this impact.

In animal experiments, nighttime exposure to blue light was connected to depression symptoms. Blue light exposure throughout the day, on the other hand, may have the opposite impact. Seasonal effective disorder, or SAD, has been treated with it. This is a type of depression that occurs when the seasons change. SAD symptoms can be alleviated by 20 minutes of blue light exposure in the morning, according to research.

The following are some steps you can take to limit blue light exposure:

  • Limit your screen time by putting away your devices two to three hours before bedtime.

  • If you are a night shift worker and cannot avoid blue light, try wearing blue light glasses which block some of the blue light.

  • Reduce the screen brightness in your device or use night light mode, if available.

  • Use a dim red light if you do use a night light when sleeping.

  • Expose yourself to plenty of sunlight, especially in the mornings

Despite the fact that stress and anxiety are complex disorders, the impact of light on these illnesses has grown over time, indicating clear links between blue and green light and the development of these problems. There are also several studies that detail the role of light in causing sleep disruptions.

The world around us is beautiful, but we use modern items and devices excessively, so it is essential to take proper preventive measures. Small changes in our lives may lead to significant changes, so minimizing blue light exposure may enhance our sleep, reduce tension, and anxiety, and therefore enhance our quality of life.

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