A major cause of the worldwide increase in light pollution (Everything from our sleep to our hormones relies on the dark. So why are we so intent on destroying it?, 31 October) has been the widespread introduction of LED lighting, especially the use of blue-rich street lighting and outdoor lighting. This has also resulted in the social exclusion of those unable to tolerate LED lighting, many of whom are now unable to access places of employment, recreation, worship, education and health.
Light matters. It affects every aspect of our health and wellbeing, and has a profound impact on the environment. The charity LightAware addresses this as a human rights and equality issue. We believe that public spaces including buildings and streets should be accessible to all.
John Lincoln
Trustee, LightAware
• Thank you, Jacqueline Yallop, for a lovely article on light pollution. How many people have had new homeowners moving next door, igniting the night sky with blazing lights that stay on for most of the night? I know that the nightingale has left my garden, the bats seem to have gone, very few moths appear around my door, and some vegetation has gone very thin and sad. Enjoyment of the stars and occasional sightings of the northern lights are no longer possible. It is difficult to think of a resolution.
Name and address supplied
• Thank you, Jacqueline Yallop, for sharing your liking of walking in the dark. I share your enthusiasm and find a torch unnecessary when walking round my Norfolk village at night. I never used one when I lived in London either, however dark the streets, as I felt much safer when not drawing attention to myself as a lone woman.
Daphne Griffith
Banham, Norfolk
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