Fluctuating illuminance pattern of tubular fluorescent daylight in 30-minute versus 8-hour measuring duration

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Published: Dec 29, 2021
DOI: https://doi.org/10.14456/sehs.2021.40
Keywords:
fluctuation fluorescent illuminance light measurement

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Ai-Hong Chen
Faculty of Health Sciences, Universiti Teknologi MARA, Cawangan Selangor, Malaysia. Corresponding author's e-mail: [email protected]
Amirul Ad-din Majid
Faculty of Health Sciences, Universiti Teknologi MARA, Cawangan Selangor, Malaysia

Abstract

This study aimed to investigate the fluctuating illuminance pattern of tubular fluorescent daylight (CT 6200K). The first investigation focused on the changes within the first 30 minutes in a 1-minute interval while the second investigation examined the changes over 8 hours duration with a 1-hour interval. Luxmeter was used to measure the illumination in pre determined geometrical points in specific room sizes. Illuminance took approximately 5 minutes to reach the peak before it started to deteriorate with time (rs(28) = -0.715, p<0.05). Then, the illuminance seemed to stabilize after the luminaires were turned on for 15 minutes. A similar decreasing pattern was found in the 8-hour duration (r(6) = -0.785, p<0.05) at multiple measurement points (F(1.540, 15.398) = 36.804, p<0.05). The recommendation for lighting experiments involving tubular fluorescent light is to start measurement only after the luminaires were turned on for 15 minutes and could be continuously measured for 4 hours.

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How to Cite
Chen, A.-H., & Majid, A. A.- din. (2021). Fluctuating illuminance pattern of tubular fluorescent daylight in 30-minute versus 8-hour measuring duration. Science, Engineering and Health Studies, 15, 21020013. https://doi.org/10.14456/sehs.2021.40
Issue
Volume 15, 2021
Section
Physical sciences
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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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