Melatonin Secretion

Category: Sleep & Circadian

Journal: Lighting Research & Technology (2014)

Key finding

Red light (630 nm) significantly increased nighttime melatonin secretion vs white or blue evening light; improved sleep efficiency.

Protocol

• Wavelength: 630 nm
• Irradiance: 25 mW/cm²
• Dose: 12 J/cm²
• Duration: Evening sessions, 4 weeks

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