Measurements of UV-A radiation and hazard limits from some types of outdoor lamps

Abstract

Illumination using artificial light sources is common in these days. Many manufactures are paying for the design of lamps depending on high efficacy and low UV hazards. This research is focusing on the most useable lamps in the Egyptian markets; high pressure mercury (HPM), metal Halide (MH), and high pressure sodium (HPS). A set up for relative spectral power distribution based on single monochromator and UVA silicon detector for absolute irradiance measurements are used. The absolute irradiance in (W/m 2) in UVA region of the lamps and their accompanied standard uncertainty are evaluated.

Illuminance and ultra violet emissions radiated from white compact fluorescent lamps

“…Glass stop the UVB and UVC, while transpire portion of UVA [17][18][19]. In the present research, measurements of the spectral power distribution, absolute irradiance and illuminance to determine various parameters such as ultra violet irradiance (UVA), ratio of UVA irradiance to electrical power (h) and ratio of UVA power to luminous flux (K), for two groups of CFLs are studied to dedicate their performance and accompanied standard uncertainties are evaluated.…”

Comparative Study of Uva-Radiation and Illuminance of White Tubular Fluorescent Lamps for Different Brands in Saudi Arabia Market

“…This method is adopted and described in details by International Organization for Standardization (ISO) [23]. The standard uncertainty ) ( i x u to be associated with input quantity xi is the estimated standard deviation of the mean [23,24] ) ( ) ( ) ( (7) Uncertainty model used for the determination of the UVA irradiance ) ( UVA E is [14,25]: The uncertainty must be quoted whenever the results of a measurement are reported, it tell us about the precision with which the measurements were made. The uncertainty budget of the absolute irradiance and illuminance measurements are shown respectively in Table 1 and Table 2 with expanded uncertainty with confidence level 95% (coverage factor k = 2).…”

“…To emphasis on use of energy saver Tubular Fluorescent Lamps, it is necessary to analyze the effect of radiation especially UV radiation on human health. UV radiation light has three wavelength regions UVA (315 nm-400 nm), UVB (280 nm-315 nm) and UVC (200 nm-280 nm) [12][13][14][15][16]. Light output in the Tubular Fluorescent Lamps is influenced by the mercury vapor pressure inside the lamp; if the pressure is either greater than or less than optimal, light output declines, and change in contain mercury vapor can change light output [17].…”