With the explosion of smartphones, laptops and iPads in modern culture, many of us are getting far too much blue light during the wrong hours of the day, which can contribute to insomnia, fatigue, and erratic sleep cycles.īlue Light exposure directly correlates to the production of Melatonin in our bodies. However, problems arise when exposure to blue light is significant later in the day when our source of natural blue light has set. Light therapy consists of exposing oneself to bright white light, which contains a high amount of HEV blue rays to help boost wakefulness and improve mood. In fact, some people have taken to using “light therapy” to battle seasonal affective disorder, which is a certain type of mood disorder that may cause depression in relation to the seasons changing (and more importantly, the change of sunlight). Research has shown that HEV helps to regulate circadian rhythm (our natural sleep and wake cycle, or “internal clock”), and helps to increase memory, cognitive function, mood, and alertness. It’s widely known in the medical community that blue light exposure is vital to maintain good health. LED lighting and fluorescent lighting are also common sources of man-made HEV.īefore diving into some of the more worrisome effects blue light can have on the human eye, it’s important to first recognize that blue light in and of itself is not bad.Most “screen” devices emit a ton of blue light (TV’s, laptops, smart phones, tablets etc.).Sunlight is our main source of natural blue light.HEV has the shortest wavelengths and highest energy of the visible (known) light spectrum.Blue light is often called “HEV” which stands for “High Energy Visible Light”.Blue light is visible to the human eye.So, what do these light sources mean to us humans? Where exactly are we exposed to these light sources and are they dangerous? Let’s dive in. The shorter the wavelength of the light, the higher amount of energy it emits, the harder it is for the human eye to focus on, and the more damaging the ray is to the eye. Both birds and bees can see UV light, which helps them detect reflections from plants.Īs most of us learned in grade school, light is made up of all the colors in the rainbow and is the reason we can even see those colors to begin with! When we look at the rainbow in “ROYGBIV” (red, orange, yellow, green, blue, indigo, violet) order, they are ordered from longest wavelengths (which have lower energy) that fall on the red side of the spectrum, to shorter wavelengths (which have higher energy) and fall on the blue end. Both forms of UV light are invisible to humans, but oddly fall within the visible range for some animals. Ultraviolet light has a couple sub-types UV-A and UB-B. Ultraviolet (UV) light might instinctively make you think of tanning beds or detective work, but what about UV’s close counterpart on the light spectrum, blue light? Does UV light really do much besides help you get a bronzed glow on vacation? It does!
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