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Luminette light glasses [Lucimed, Villers-le-Bouillet, Belgium; (A)] with light emitting diodes (approximately 2000 lux; blue-enriched 400–750 nm) and short-wavelength filter glasses [MelaMedic, Viborg, Denmark; (B)], which filter light in the blue range of the spectrum, i.e., the one our visual circadian timing system is most sensitive to.
