Tehran University of Medical Sciences International Journal of Occupational Hygiene 2008-5109 9 1 2017 05 20 33 37 EN EHSAN HABIBI Professor, Department of Occupational Health Engineering, School of health, Isfahan University of Medical Sciences, Isfahan, Iran HABIBOLLAH DEHGHAN Assistant Professor, Department of Occupational Health Engineering, School of health, Isfahan University of Medical Sciences, Isfahan, Iran SAEID YAZDANIRAD PhD student, Department of Occupational Health Engineering, School of health, Tehran University of Medical Sciences, Tehran, Iran SAEID LOTFI M.S Student, Department of Occupational Health Engineering, School of health, Isfahan University of Medical Sciences, Isfahan, Iran AKBAR HASSANZADEH Instructor, Department of Statistics and Epidemiology, School of Health, Isfahan University of Medical Sciences, Isfahan, Iran. 2017 04 03 2017 05 20 Harmful physical factors of workplace including lighting may affect the cognitive performance of human. Therefore, tests of job skill assessment (BATTERY method) were used to conduct this study under experimental condition, with the aim of determining the effect of lighting on the accuracy and pace of working in men. This experimental study was conducted on 29 male students in the climatic chamber under the conditions of mild weather (40% relative humidity and dry bulb temperature of 20 °C) in the laboratory of the School of Public Health, Isfahan, Iran in 2016. Participants took a rest for 10 to 15 min. Then they carried out all tests of job skill assessment (BATTERY method) in 0, 40, 80, and 120 min after beginning. The number of errors (accuracy assessment) and the duration of the test (pace assessment) were recorded.  There was a significant difference in the mean values of accuracy and pace in exposure to different intensities of lighting (200, 500, 800, 1500 lux) while carrying out the job skill assessment tests (P<0.001). An increase in the intensity of lighting may enhance people’s performance and limit unsafe behaviors by increasing the accuracy and pace of working while conducting cognitive activities. https://ijoh.tums.ac.ir/index.php/ijoh/article/view/262 https://ijoh.tums.ac.ir/index.php/ijoh/article/download/262/339