[Dick Young]

I also suffer from terrible light pollution but as an expert in some aspects of lighting, including photobiological safety, I feel I should should dispel some false assertions. There is absolutely no evidence that white light LEDs, either warm white or cold white, cause cancer and such stories fall squarely under “fake news”. There is evidence in humans and animals for them affecting circadian rhythms but it requires you to stare at them for hours and hence most people are unaffected. Also, when addressing light concerns we should separate effects that take place in the atmosphere, like scattering, and these that take place in the eye, like glare.

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