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In 2009, a team of Japanese researchers led by Masaki Kobayashi from the Tohoku Institute of Technology discovered that the human body emits visible light in small quantities that vary during the day.0 The amount of light emitted follows a 24-hour cycle, at its highest in late afternoon and lowest late at night, and the brightest light is emitted from the cheeks, forehead, and neck.3 The diurnal changes in photon emission might be linked to changes in energy metabolism.2 The intensity of the light emitted by the body is 1000 times lower than the sensitivity of our naked eyes.4 The human body emits infrared radiation, with a peak wavelength of about 9.35 micrometers.1
petapixel.com quora.com 1 journals.plos.org 2 theguardian.com 3 ncbi.nlm.nih.gov 4
What Does Your Light Eat?