Is LED Grow Light Harmful to People’s Eyes?
The light sources of many LED grow lights are mainly composed of red and blue light sources. since these two colors light source are the most sensitive ranges of light waves for plants. The applied blue light wavelength is 450-460nm and 460-470nm.
Blue light is relatively high-energy light with a wavelength between 400nm-480nm. It is widely used in computer monitors, fluorescent lamps, mobile phones, digital products, display screens and led grow lights. Blue light in this wavelength will increase the amount of toxins in the macular area of the eyes, which will seriously threaten our eye health if we watch for a long time. so when you are inspecting indoor greenhouse gardens with led grow lights installed inside , especially those lights mixed with blue light , it is better for you to wear LED's grow glasses , which can protect your eyes well from blue light.
the specific hazards of blue light
1) Blue light will aggravate the disease of macular area of retina
With age, lipofuscin (cellular debris) left behind by phagocytosis of retinal pigment epithelial cells gradually accumulates in the layer of retinal pigment epithelial cells, causing the retina to become more sensitive to chronic light exposure injuries. Blue light exacerbates the macular problems associated with genetics, nutrition, the environment, health habits, and aging. The toxicity of the retina will increase with the shortening of the wavelength after a long exposure, thus exacerbating macular disease.
2) cause eye damage after cataract surgery
With age , the lens of the body itself gradually turns yellow. This can help filter the blue light .however, generally patient will lose this natural barriers after cataract surgery. Retina will be directly touched by blue light, and then the retinal pigment epithelial cells are damaged, which will seriously affecting the eyes health . it is best for people who with eye problems not to get into the garden room where is full of blue light or blended lighting with more blue light .
3) trigger blurred vision and lead to visual fatigue
When blue light entering eyes and it is focused, the focus is not on the retina but between the retina and the lens. This increases the chromatic aberration distance the light focuses in the eyes. the main reason for the formation of blurred vision is the distance between the true focus and the desired focus(the focus on the retina ). Therefore, the incident blue light will aggravate the color difference and the degree of visual blurring, leading to excessive strain of eye muscles and blood supply for eyes. according to the operating mechanism of the body , the blood supply to the eye should be strengthened to ease the produced tension. However a highly complicated blood transport will trigger visual fatigue. So blue light in a comprehensive reaction will trigger blurred vision and lead to visual fatigue.
4) Blue light is a kind of light with relatively high energy. Generally, the higher energy photons have a higher chance of scattering when they encounter small particles in the air. This also is why blue light is easier to dazzle.
5) inhibit the secretion of melatonin, disturb sleep, and increase the incidence of major diseases.
Being exposed to blue light for a long time will stimulates the brain, which makes the brain in an excited state and affects the human body clock. Insomnia symptoms such as too long time to fall asleep and multiple awakenings during sleep may occur.
Poor sleep means that all organ systems are prone to dysfunction. People who don't get enough or quality of sleep have significantly reduced immune function, reactivity, memory and coordination, and increased risk of diabetes, heart disease, cancer, obesity, indigestion, constipation, and depression.
From the above information, I believe you have gained some understanding of the harms caused by blue light.Blue light almost exists in the light source of most led grow lights.in terms of the lamps that supplement lighting for crops on the market, the spectral wavelength of blue light and red light is relatively concentrated and the energy is higher than ordinary lighting products.this is the reason why we don’t advice users who use led grow lights in their garden stare at these lamps for a long time to see .
in addition ,there is clearly a phenomenon of colour interference on the crops of garden rooms where have installed led grow lights and lights are on . If you want to observe the real and natural state of the plants as what they show outside, without having to turn off the lights. A pair of LED’s grow glasses is what you really need.
