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