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Light As A Time Factor
New research in the area of biological rhythms prove that light sets our inner biological clock.
How does that function?
The light that falls onto the retina within the eye sets into action the visual process in the brain. The light-sensitive pigment that has only recently been discovered on the retina called melanopsin transforms the light into electrical signals. Via the visual nerve and the so-called suprachiasmatic nucleus (SCN) these reach the pineal gland. This in turn is responsible for the discharge of the sleeping hormone melatonin.
The melatonin content in the blood regulates alertness, spriteliness, body temperature and the need for sleep. But it is important to note that the less light present, the more melatonin is discharged and the more tired we become.
Pick-Up Factor Light
With the dedicated use of higher illuminance levels, the production of melatonin can be inhibited. Employees benefit from a greater vitality, which in turn positively effects their sense of well-being and performance. This phenomenon is particularly apparent with night-shift workers. With high levels of lighting, tiredness during night-time hours can be combatted, and mistakes can be avoided. It has also been shown that high lighting levels during night work increases recuperation during rest periods at daytime. In order to combat the nightly discharge of melatonin, illuminance levels greater than 2000 lux are necessary. Normal lighting levels of 500 lux in offices and manufacturing areas is of little help here.