In this conversation, Dr Glen Jeffery a Neuroscience Professor at UCL, London and Dr Sara Pugh discuss the hidden dangers of modern lighting, particularly the shift from incandescent bulbs to LEDs, and how this affects our health, mitochondria, ageing and metabolism. He highlights the importance of long wavelengths of light red light and near infrared for mitochondrial function and metabolic control, and warns against the misleading marketing of red light therapy devices. The discussion also covers the impact of artificial lighting on wildlife and the need for better lighting solutions in public health settings and a better understanding of light overall.

Retreats April 2026 Dr Sara and Dr Ralf

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Takeaways

• High powered red light gadgets may pose risks.

• Incandescent light is crucial for health and metabolism.

• Loss of long wavelength light affects metabolic control.

• Mitochondria are key to energy production and health.

• Long wavelengths of light interact with water in unique ways.

• Protein synthesis is essential for overall health.

• Research shows light impacts wildlife and ecosystems.

• Quality of LED lighting varies significantly.

• Natural light exposure is vital for well-being.

• Compromises in lighting solutions are necessary for public health.

Sound bites

• “LEDs may be built to sell and not heal.”

• “Life on earth evolved under sunlight.”

• “Profit-making machine has to be stopped.”

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DISCLAIMER: This podcast is for entertainment purposes only and does not constitute medical advise. Please consult your healthcare provider before making any medical decisions. Views expressed by guests are their own and do not necessarily reflect those of the host.