Hasibi, R. A. A., Jamal, A., Surahmat, I., Hardiyanto, T., Jusman, Y., & Arkan, F. (2019). Comparative Analysis of the Use of LED and HPS Lights in PT. Bukit Asam. Journal of Electrical Technology UMY, 3(3), 83–88. https://doi.org/10.18196/jet.3358