Amer Ibrahim, Ibrahim. “Design and Implementation of a Digital Luxmeter for Investigation of a Lighting Standard”. Journal of Engineering and Sustainable Development 16, no. 3 (September 1, 2012): 374–389. Accessed June 3, 2026. https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/1288.