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Blue light, a type of high-energy light, is part of the visible light spectrum. High-energy visible light (HEV light) is short-wave light in the violet/blue band from 400 to 450 nm in the visible spectrum, which has a number of purported negative biological effects, namely on circadian rhythm and retinal health (blue-light hazard), which can lead to age-related macular degeneration.
It emits more blue light than traditional incandescent bulbs, potentially impacting the quality of sleep and eye health if used excessively at night. [2] [8] A person using a smartphone at night. Blue light is emitted by digital screens such as computers, tablets, smartphones, and televisions, which can lead to extended exposure in modern lives ...
Consistent light exposure has a greater effect than intermittent exposure. [14] In rats, constant light eventually disrupts the cycle to the point that memory and stress coping may be impaired. [15] The intensity and the wavelength of light influence entrainment. [2] Dim light can affect entrainment relative to darkness. [16]
Screens — including TV, your phone and your computer — provide blue light exposure that may impact sleep. “There’s a lot of data that says the light disrupts the circadian rhythm and ...
Where blue light may be more impactful, then, is negatively influencing our circadian rhythms; and late-night computer, phone and television users often experience disruption in their natural ...
According to Harvard Medicine, blue light can help boost focus and mood during the day but can disrupt sleep at night and suppress the release of melatonin—the sleep hormone. Blue light has also ...
Using technology before falling asleep can affect a student's sleep pattern. [13] The blue light that is emitted from the screens of cell phones, computers, and other devices stops the production of melatonin, [13] a hormone that controls the sleep-wake cycle of the circadian rhythm. [13]
The ideal temperature for sleep is typically between 60°F and 67°F for most adults, says Martina Vendrame, M.D., neurologist and sleep medicine specialist at Lehigh Valley Health Network.