How much light does it take to harm you at night?

A new study in The Lancet shows a surprisingly low level of light triggers diabetes risk

Now that my book, THE LIGHT DOCTOR¹, has been published, this Substack newsletter will delve into specific in-depth questions about healthy and unhealthy lighting. I will also update you with the latest research findings, technology developments, and new products that impact your light exposure and health.

For example, in my book, I have discussed the e…