Did he recommend going back to candles and reducing electricity use?
A question put to AI seems to seriously quell the anxiety raised by the alarming blue light effect on human diabetes and other mitochondrial health issues.
A study associated with Jeffery found that 420-nanometer light affected mitochondria in fruit flies, βbut these findings do not prove that normal indoor LED lighting causes metabolic disorders in people.
For humans, the best-established effects of excessive evening blue-rich light are circadian disruption and sleep suppression. Those effects could indirectly influence glucose regulation and metabolism, but that is different from proving that blue light directly damages mitochondria throughout the body.
Practical steps are simple: use brighter, daylight-like light during the day; dim lights in the evening; avoid staring at bright screens close to bedtime; and use warmer, lower-intensity bulbs at night. There is no strong reason to avoid normal LED lighting during daytime, and blue-light glasses have not been shown to prevent diabetes or broadly protect mitochondria.