Reasonable installation distribution and high-quality LED lights with flicker-free, Anti-glare, and warm white do not harm our health.
Glare refers to a condition that causes visual discomfort and reduces the visibility of objects due to inappropriate brightness distribution or extreme brightness contrast in space or time. The light sensation in the field of vision that the human eye cannot adapt to may cause disgust, discomfort, or even loss of vision. There is too high brightness in a specific part of the field of vision or too significant brightness changes before and after. Glare is one of the essential causes of visual fatigue.
The consequences of Glare can be divided into three types: discomfort glare, light adaptation glare, and energy-depleting Glare.
a. Discomfort glare refers to the discomfort felt in specific too-bright environments, such as reading in strong sunlight or watching high-brightness TV in a dark room. When the human eye's field of vision must switch between environments with a significant difference in brightness, it will feel uncomfortable. This uncomfortable situation will cause an escape movement of the eye and reduce vision.
b. Light adaptation glare refers to a phenomenon in which the vision of both eyes decreases when people walk from a dark movie theatre (or underground tunnel) into the sun. The main reason is that the strong glare source forms a central dark spot on the human eye's retina, causing long-term unclear vision.
c. Energy-depleting Glare refers to a phenomenon in which the contrast of the retinal imaging of the human eye decreases due to the surrounding messy glare sources. This makes it difficult for the brain to analyze the imaging, similar to the performance of a slide projector on the wall being disturbed by the intense light next to it, resulting in decreased imaging quality.
LED stroboscopic/flicker refers to the fluctuation of the luminous flux of an LED light source at a particular frequency. This fluctuation causes the brightness or illumination of the light source to change, thus causing a flickering phenomenon in the human eye.
The stroboscopic effect has many effects on the human body, including headaches, eye fatigue, decreased vision, psychological stress, and potential safety issues. In particular, migraine patients are susceptible to light, and stroboscopic light may induce or aggravate migraines.
In addition, for patients with photosensitive epilepsy, stroboscopic light of a specific frequency (such as 3-70HZ) may trigger epileptic seizures.
Therefore, long-term exposure to stroboscopic light should be avoided as much as possible, especially for those sensitive to light and children in the developmental stage of vision.
Blue light has a wavelength between 400-500 nanometers in the visible spectrum and has high energy. Blue light not only exists in nature, such as sunlight, but also widely exists in light sources of electronic products, such as computer monitors, fluorescent lamps, mobile phones, and LEDs. The 415-455nm band in blue light has the characteristics of short wavelength and high energy, which can penetrate the lens directly to the retina. Long-term excessive high-energy blue light radiation will cause damage to the retina and visual cells.
Eye fatigue: Long-term exposure to blue light may cause eye discomfort, blurred vision, and other symptoms of eye fatigue.
Decreased sleep quality: Blue light may inhibit the secretion of melatonin, thereby affecting sleep quality
Retinal damage: The high energy of blue light may cause long-term damage to the retina and increase the risk of age-related macular degeneration.
Aggravate dry eye syndrome: Blue light stimulation may aggravate the symptoms of patients with dry eye syndrome.
Increase intraocular pressure: Blue light may cause increased intraocular pressure, potentially increasing the risk of eye diseases such as glaucoma.
Unreasonable LED lighting design or installation may cause light pollution, such as Glare, reflection, etc. These phenomena will interfere with people's vision, affecting comfort and work efficiency.
In addition, excessive light pollution may also affect people's biological clock and sleep quality, which in turn hurts physical health.
Generally speaking, the proportion of blue light in warm white LEDs is less than in cold white LEDs. Therefore, indoor lighting should avoid using LED lighting products with a color temperature of more than 5000K, and the general CRI should be more than 80.
- Avoid looking directly at LED light sources for a long time to reduce irritation and eye damage.
- When you need to rest, turn off or dim the LED lights appropriately to reduce eye fatigue.
Reasonable lighting design can reduce light pollution, such as Glare and reflection, and improve lighting comfort and efficiency.
When choosing LED lamps, you can pay attention to parameters such as light distribution, color temperature, brightness, etc., to ensure the lighting effect meets actual needs.
Generally speaking, the harm of LED light is much lower than that of TV displays, computer displays, mobile phone screens, etc., because we always look directly at the LED display screens of mobile phones, computers, and TVs, but we don't look directly at the LED lights.
So, reasonable installation distribution and high-quality LED lights that are flicker-free, anti-glare, and warm white do not harm our health.
