COMPARATIVE STUDY OF UVA-RADIATION AND ILLUMINANCE OF WHITE TUBULAR FLUORESCENT LAMPS FOR DIFFERENT BRANDS IN SAUDI ARABIA MARKET

Manal A. Haridy, Khadigjah R. Alreshidy, Ghazia S. Alazmi

Abstract: Lighting is a major use of energy in schools and universities. White Tubular Fluorescent Lamps (WTFLs) are lit mainly Hail university faculties and administration buildings. As the use of WTFLs becomes increasingly widespread so also increases the concerns relating to their mercury content and the associated hazards. While the risk associated with individual WTFLs is generally concerned negligible, the cumulative impact of millions of WTFLs does however becomes a more significant issue and could represent a potential risk to the environment. The present study aimed to focus on three different brands of white tubular fluorescent lamps (WTFLs) which are the most useable lamps in the Saudi Arabia markets and evaluate the relationships between UV emissions radiated and illuminance. Various parameters such as ultra violet irradiance (UVA), ratio of UVA irradiance to electrical power (?) and ratio of UVA power to luminous flux (K), for the four of WTFLs are studied to dedicate their performance. A set up based on UVA/B silicon detector for irradiance measurements in UVA region. Second set up for Luxmeter is used for measuring illuminance. For all three different brands under study, K parameter remains less than the safe limit for human health. YAMANY -18 -60 cm Watt WTFLs have the smaller ratio (?) than Philips 18 Watt -60 cm WTFLs. ELETRA -36 Watt -120 cm WTFLs have the smaller ratio (?) than Philips 36 Watt -120 cm WTFLs. According to our results, we recommended using YAMANY -18 Watt than Philips 18 Watt at short distance in table lamps or other applications and the distance more than 0.5 meter. Also, we recommended using ELETRA -36 Watt than Philips 36 Watt at short distance in table lamps or other applications and the distance more than 1 meter. Data analysis was performed and uncertainty model includes all parameters accompanied with the measurements are calculated.

Keywords: White Tubular Fluorescent Lamps (WTFLs), Illuminance, UVA Radiation, Irradiance, Uncertainty.

DOI: https://doi.org/10.15623/ijret.2017.0606001