<![CDATA[More than just a daily activity, sleep holds many benefits for the body. This is shown by the hadith of the Prophet, particularly those related to sleep under certain conditions, such as the recommendation to turn off the lights. This study addresses two questions: first, how should the hadith concerning the recommendation to turn off the lights while sleeping be interpreted from the perspective of maqāṣid al-syarī’ah, particularly in ḥifż al-nafs? Second, how is this prophetic recommendation relevant to modern scientific findings regarding the effects of light exposure on sleep quality? This study employs two approaches. From the hadith perspective, the author employs a quasi-qualitative approach. From the scientific perspective, the author uses a systematic literature review method, assisted by Publish or Perish (PoP), with data obtained from Google Scholar. The selected articles were identified based on specific inclusion criteria, and the article selection process was conducted using the PRISMA flow diagram. The findings indicate that the majority of the reviewed articles show that sleeping in a dark environment is associated with better sleep quality through the optimization of melatonin production and circadian rhythm regulation. Although some other studies did not find statistically significant relationships, they nevertheless demonstrated a similar trend. Analysis of Saḥīḥ al-Bukhārī indicates that the recommendation to turn off the lights before sleeping is not merely an ethical instruction but also reflects the principles of maqāṣid al-syarī’ah, particularly ḥifż al-nafs and ḥifż al-māl. Thus, the hadith provides a normative foundation, while modern science explains the underlying biological mechanisms.]]>
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