en Occupational Health Original Article <div style="text-align: justify;"><span style="font-family:times new roman;"><strong>Background:</strong> Lighting is a basic need for human beings and affects their physical, physiological, and psychological behavior. The required level of lighting for visual performance must be provided in order to ensure health and wellbeing. Students spend much of their time studying in libraries, and thus, sufficient lighting is necessary in libraries. Therefore, the aim of the present study was to determine lighting intensity in university libraries in Rafsanjan, Iran.<br> <strong>Materials and Methods:</strong> The present cross-sectional study was conducted on 13 university libraries of Rafsanjan in April 2014. To assess natural and total lighting intensity, the network method was used. Lighting intensity was measured in a total of 314 stations in the university libraries of Rafsanjan. The collected data were analyzed using descriptive statistics.<br> <strong>Results:</strong> The men&rsquo;s section of the library of Vali-E-Asr University of Rafsanjan had the highest total lighting intensity (1265.40 &plusmn; 530.95 lx) and the men&#39;s section of the library of the School of Medicine, Rafsanjan University of Medical Sciences, had the lowest total lighting intensity (91.06 &plusmn; 29.40 lx). Among the 13 study halls of the studied libraries, 4 (30.7%) halls had no windows. The lack of windows has an undesirable effect on the intensity of natural lighting.<br> <strong>Conclusions:</strong> Based on the results of this study, the average lighting intensity in 50% of the studied libraries was less than the Iranian standard. Therefore, the redesigning and modification of the lighting systems of these libraries are necessary.</span></div> Lighting,Libraries,Universities,Iran, 92 97 http://johe.rums.ac.ir/browse.php?a_code=A-10-40-1&slc_lang=en&sid=1 A Esmaeili esmailiabbas@yahoo.com 22400319475328460010420 22400319475328460010420 No Dept. of Environmental Health Engineering, School of Health, Occupational Environment Research Center, Rafsanjan University of Medical Sciences, Rafsanjan, Iran. Rafsanjan University of Medical Sciences M Rezaeian moeygmr2@yahoo.co.uk 22400319475328460010421 22400319475328460010421 No Dept. of Epidemiology and Biostatistics, Occupational Environmental Research Center, Medical School, Rafsanjan University of Medical Sciences, Rafsanjan, Iran. Rafsanjan University of Medical Sciences HR Naghizadeh hamidreza.n1359@yahoo.com 22400319475328460010422 22400319475328460010422 No Deputy of Health, Rafsanjan University of Medical Sciences, Rafsanjan, Iran. Rafsanjan University of Medical Sciences Sh Khajehosseini shirin.khaje89@gmail.com 22400319475328460010423 22400319475328460010423 No School of Nursing and Midwifery, Rafsanjan University of Medical Sciences, Rafsanjan, Iran. Rafsanjan University of Medical Sciences M Mobini mobinilk@gmail.com 22400319475328460010424 22400319475328460010424 Yes Dept. of Environmental Health Engineering, School of Health, Rafsanjan University of Medical Sciences, Rafsanjan, Iran. Rafsanjan University of Medical Sciences