Masopoga, Idah, Christo van der Merwe, and L.J. Grobler. “Measurement and Verification of a Lighting Load Reduction Project through Energy Efficiency”. Journal of Energy in Southern Africa 20, no. 3 (August 1, 2009): 11–13. Accessed July 22, 2024. https://journals.assaf.org.za/index.php/jesa/article/view/3305.