Dangers from blue light exposure worsen with age

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Joined Aug 27, 2009
Blue light is a predominant component of light emitting devices (LEDs), which are increasingly present in our environment. There is already accumulating evidence that blue light exposure causes damage to retinal cells in vitro and in vivo; however, much less is known about potential effects of blue light on non-retinal cells. That blue light may be detrimental at the organismal level independent from retinal effect was recently shown by findings that it reduces lifespan in worms and also in flies with genetically ablated retinas.
Understanding the effects of BL on cellular functions is becoming a significant health issue as humans are exposed to more blue-enriched LED illumination for most of the day and even at night due to shift work and light pollution in large cities1. While acute BL is phototoxic to different cells types in vitro16, it is not known whether daily BL exposure across the human lifespan may have long-term effects on cellular functions. Research on model organisms could provide insights into the effects of BL on conserved cellular pathways. Having previously reported that daily exposure to 12 h of BL accelerates aging in adult Drosophila8, we investigated the effects of constant BL on young, middle age, and old flies. We demonstrate that BL affects flies differently across their lifespan with decreased survival and increased brain neurodegeneration observed in old flies after the same length of BL exposure. Furthermore, our data suggest that age-dependent impairments in mitochondrial respiration and energy production contribute to the increased phototoxic effects of BL in older flies.

I hate the Blue Led light from devices and light sources.

The Hazards of Blue Light
The French Agency for Food, Environmental and Occupational Health & Safety’s (ANSES) report on the “effects on human health and the environment (fauna and flora) of systems using light-emitting diodes (LEDs)” recommends limiting exposure to blue-rich white light from LED for many reasons.

A bright blue light hurts everyone who can see it, regardless of their proximity to the source. Small point, high intensity, blue-component-rich light, like LEDs, can be reflected from a surfaces (desk or counter top, for example) and reach the eyes. LED lamps are richer in blue content compared to other artificial light sources, and the photobiological risk is even higher when cool-white light is used. Cool-white lights contain particularly high blue content, have high color temperature (i.e. 6000K or higher), and is often used in retail spaces.