https://doi.org/10.33573/ujoh2015.03.034

Martirosova V. G.1, Sorokin V. M.2, Nazarenko V. I.1, Dmitrukha N. N.1

PECULIARITIES OF THE EFFECT OF LED COLD-WHITE LIGHTING RADIATION ON THE LEVEL OF 6-SULFATOXIMELATONIN IN THE HUMAN BODY

1SI "Institute for Occupational Health of NAMS of Ukraine", Kiev

2Institute of physics of semiconductors named after Loshkarev V. E., Kiev

Full article (PDF), RUS

Introduction. LED sources of cold-white light with Tcolor = 4000 K and higher emit a powerful flux, ranging 400–500 nµ of the visible light, coinciding with the zone of the higher sensitivity (477 nµ) of new, recently discovered ganglion retina cells (GRC). Nervous ways of GRC are ended in the hypothalamus and affect the pineal gland secretion – melatonin hormone. It is supposed that the work in conditions of the light environment, equipped with cold-white lamps, can result in inhibition of melatonin secretion, influencing many endocrine processes in the body. The studies, conducted by the authors, showed that in the process of work in conditions of the general uniform illumination with LED cold-white lighting of Tcolor = 5999 K, following hygienic requirements, work capacity rates in workers were higher and more stable than with LED Tcolor = 2700 K.

Purpose of the work. Studying and comparative analysis of the effect of LED radiation with Tcolor = 6000 K on the content of melatonin in the body of office workers, working in conditions of LED and luminescent lighting.

Methods. The content of 6-sulfatoximelatonin metabolite in urine of 10 office economists, performing their occupational tasks in conditions of the light environment, equipped with LED with Tcolor = 6000 K under the illumination of 350–400 Lux from the system of the general uniform illumination within 2 months, was studied. The control group covered 10 economists of the other office aged 25–30, working in equal conditions as the main group, but under illumination with linear luminescent lamps of the same Tcolor K.

Conclusion. It is established that the content of metabolite melatonin in the main group (under less excess) does not practically differ from the content of metabolites in the urine of office workers of the control group, supposing the lack of availability of negative effects from exposure to LED cold-white sources of radiation on the human body ( p < 0,05).

Key words: LED, color temperature, office workers, 6-sulfatoximelatonin metabolite, metabolite metabolism

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