Materials and methods: In a descriptive cross-sectional study, 50 schools were selected by random sampling and the illuminance was measured using network method. In each place 2 to 10 measurements (between 8:00 AM and 14:00) were done using Lux meter (TES; A1336). Data was analyzed by GEE in SPSS V. 20.

Results: The lighting intensity was measured in 306 places including 194 classrooms, 49 offices and 63 corridors. Our evaluation showed that 34% of the classrooms, 40.8% of the offices, and 33% of the corridors had appropriate standard illuminance.

Conclusion: This research showed that incorrect layout of windows, the materials and colors of the walls and the material of the floors and curtain styles had significant effect on the lighting of the places.