تأثیر نور سرد و گرم لامپ‌های ال ای دی بر عملکرد تایپ کردن دانشجویان دانشگاه‌های علوم پزشکی شهر تهران: یک گزارش کوتاه

Background and Objectives: Nowadays, people spend a considerable amount of time in buildings, having artificial lighting systems throughout the day. LED lamps with low energy use and high efficiency are one of the most used sources. Considering the effect of lighting sources color temperature on human performance, the current study evaluated the effect of LED lamps in two color temperature mods on typing performance of students. Materials and Methods: In this clinical trial study, 24 students from the Tehran medical universities contributed through non-probabilistic (available( sampling method. Each participant underwent two trials with cool and warm LED lightings (color temperatures of 3000 and 4000 °k) having to complete randomized typing tasks. Statistical Analysis was performed using Wilcoxon Signed-Ranked Test. Results: Mean and standard deviation of typing speed under cool LED lighting condition was 25.06±3.13, and typing accuracy with error percentage was 0.45±0.53. The results showed higher typing speed and accuracy under cool light (p=0.002). Conclusion: The results indicated that the typing performance is improved at 4000 °k color temperature. Considering that the LED lamps under cold temperature and the color temperature of 4000 °k can increase the speed and decrease the error compared to the warm light and color temperature of 3000 °k, the use of LEDs with higher color temperature is recommended in order to improve the performance, Key words: Color temperature, LED lamps, Cool light, Warm light, Typing   Funding: This study was funded by University of Social Welfare and Rehabilitation Sciences in Tehran. Conflict of Interest: None declared. Ethical approval: The Ethics Committee of University of Social Welfare and Rehabilitation Sciences approved the study (IR.USWR.REC.1395.19).   How to cite this article: Amouzadeh E , Zakerian S.A, Osqueizadeh R, Rezasoltani P, Moshtaghi S, Jamshidzad M. The Effect of Warm and Cool LED Lighting Conditions on Students’ Typing Performance in Tehran Medical Universities: A Short Report. Univ Med Sci 2018; 17 (2): 177-84. [Farsi]