Illuminance and ultra violet emissions radiated from white compact fluorescent lamps

Abstract

During recent years, white compact fluorescent lamps (WCFLs) have played a key role in energy efficient campaigns worldwide. As the use of WCFLs becomes increasingly widespread so also increases the concerns relating to their mercury content and the associated hazards. While the risk associated with individual WCFLs is generally concerned negligible, the cumulative impact of millions of WCFLs does however becomes a more significant issue and could represent a potential risk to the environment. The present study aimed to focus on the most useable lamps in the Egyptian markets; white compact fluorescent lamps (WCFLs) and to evaluate relationships between UV emissions radiated and illuminance compact fluorescent lamps (WCFLs). Various parameters such as ultra violet irradiance (UVA), ratio of UVA irradiance to electrical power (η) and ratio of UVA power to luminous flux (K), for two groups of CFLs are studied to dedicate their performance. A set up based on NIS-Spectroradiometer ocean optics HR 2000 has been used for measuring the spectral power distribution white WCFLs with different Egyptian market. Second set up for NIS-UVA silicon detector for absolute irradiance measurements and relative spectral power distribution based on Spectroradiometer are used. The absolute irradiance in W/m2 in UVA region of the lamps and their accompanied standard uncertainty are evaluated. Third set up based on NIS Luxmeter are used for measuring illuminance for these lamps. For all two groups under study, K parameter remains less than the safe limit for human health. Elios 32 watt WCFLs have smaller ratio (η) than Tiger 26 watt WCFLs. So, we recommended using Elios 32 watt WCFLs than Tiger 26 watt WCFLs at short distance in table lamps or other application and the distance more than 0.5 m. Uncertainty model includes all parameters accompanied with the measurements are calculated.

Keywords

• white compact fluorescent lamps
• illuminance
• UVA radiation
• irradiance
• uncertainty