Page 135 - LNA Standards Manual 2018 update

colors have longer wavelengths and lower Kelvin temperatures (2700
Color Temperature (CCT) describes the relative color appearance of
color can directly affect a person’s release of melatonin, a hormone
to 3500K) whereas cool, neutral white colors have short wavelengths
Lighting LIGHT COLOR
secreted by humans to regulate their circadian rhythms. Correlated
appears more yellow/gold (warm) or more blue (cool). Warm white

Light has a profound effect on the body’s circadian cycle and light
sunlight and can suppresses melatonin release improving mood
Short wavelength or blue light closely resembles bright mid-day
a white light source and is an indicator of whether the light source

and higher Kelvin temperatures (3600-5500K).

reaction times. and boosting alertness, attention, workplace productivity, and Studies show that longer wavelength, warmer light has less influence on circadian rhythms and melatonin levels and that dark rooms encourage the body’s release of melatonin, inducing sleep. Incandescent bulbs are approximately 2700K while most fluorescent office lighting is approximately 4000K. This standard seeks to find a balance a

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Recommended CCT Levels