Lighting design for hospital laboratories

The authors discuss the adequacy of lighting of a laboratory which utilises new technologies for greater environmental comfort, to meet legislative requirements.

After measuring the brightness of natural light together with the artificial light above working places, a new lighting project was designed making the necessary changes. Laboratory professionals are exposed to ergonomic, biological and chemical risks. In order to reduce these risks, the environment must be appropriate to the activities to be performed. Noise, temperature, ventilation and lighting must be controlled. The site observation was made

together with the study of the whole architectural plant. We measured the illuminance (lx), between 12 and 14 hours with the interference of natural light and the use of an algorithm with mathematical light distribution curve (LDC) in the extension of the standard IES (Illuminating Engineering Society) curve. The IES curve, which is the form of

standardised electronic files for simulation of lighting projects with available software, was of a similar lamp model E4433/218 manufactured by Lumini Lighting Equipment Ltd. The IES curve used was from a national manufacturer with imported compact lamps of fluorescent discharge with a double bulb of 18 watts (W) and a lifespan of 8000 hours, 82 colour reproduction index (CRI) and correlated colour temperature (CCT) of 2700 (K) with low internal pressure and reactor feeding this lamp, which can be of high or low power factor. The installed lighting system was not monitored and the lifespan of the lamps were not verified. Based on existing architectural

dimensions, the architectural design was transformed to the language of the German Dialux software, a free programme, which is one of the tools used to aid lighting designers. This

program uses the light distribution curves of the optical assembly under study. The language in standardised digital formats gave rise to the standard IES curves. This standard IES transfers the information obtained in the photometric curves of light sources and light intensity in each direction through the calculation algorithm. All calculations were made through the Dialux system. The mathematical and physical result

shows the average luminous flux (average lux) and/or through direct light for candelas per square meter. All reflections, refraction and transmission were determined according to the colour of the paint and coatings used on the surfaces. The level of illuminance considered the reflections issued by the environment and through reflective percentage. The Dialux system also displays the level of light intensity (candela, cd) beyond the average

icardo Gomes Lopes Ricardo Gomes Lopes is an Architecture

professor at UNESA. He graduated in Interior Design at UNESA and Post graduated in Higher Teaching at UNESA, Mastering in

Health, Laboratory Medicine and Forensic Technology at UERJ.

Luís Cristóvão de Moraes Sobrino Pôrto

Luís Cristóvão de Moraes Sobrino Pôrto

graduated in Medicine at the State University of Rio de Janeiro in (1980, PhD in Human Biology at Université Claude Bernard-Lyon I (1990).

He is a Professor, Director of Polyclinic Piquet Carneiro and coordinator of the Histocompatibility Laboratory and

Cryopreservation Institute of Biology Roberto

Alcântara Gomes da UERJ. He has experience in cell and tissue biology, histocompatibility and clinical pathology and works on topics including

tissue repair, organ transplantation, hepatitis and management in laboratory medicine.


Maria Angélica Paixão Maioli

Maria Angélica Paixão Maioli is a Pharmacist at Pedro Ernesto University Hospital, UERJ. She

has experience in public health with emphasis in health surveillance. She has a Master of Health, Laboratory Medicine and Forensic Technology / UERJ and is aspecialist in Health

Surveillance of Medicines - ENSP / Fiocruz and Homeopathy-IHB.

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