Objectives: Exposure to nighttime light pollution has a multidimensional environmental impact and is associated with harmful health effects. This study aimed to characterize individual interventions to reduce nighttime light exposure among adults in Poland and to identify factors associated with the implementation of individual interventions to reduce nighttime light exposure. Material and Methods: This is a secondary analysis of data obtained from the nationwide cross-sectional survey conducted in December 2024 in a representative sample of 5006 adults (18–64 years) in Poland. Respondents were asked about the implementation of 5 different interventions to reduce nighttime light exposure. Results: Among all respondents (N = 5006), the most common intervention to reduce nighttime light exposure was the use of blackout curtains in the bedroom (41.4% of respondents), followed by limiting screen time in the evening (17.6% of respondents). Among the respondents, 14.7% declared turning off indicator lights on electronic devices or using light bulbs with a warmer color. The least common method was using an eye mask (3.9% of respondents). In total, 65% of respondents had implemented ≥1 individual intervention to reduce exposure to nighttime light pollution. Age 18–44 years, having a full-time or part-time job, good financial situation, having sleep problems, and looking for health-related information were significantly associated (p < 0.05) with the implementation of ≥1 intervention to reduce exposure to nighttime light pollution. The most important factor associated with the intervention to reduce exposure to nighttime light pollution was active seeking health information (OR = 2.17, 95% CI: 1.9–2.48, p < 0.001). There was no significant impact of gender, educational level or place of residence (p > 0.05). Conclusions: This study revealed a gap in the implementation of individual interventions to reduce exposure to nighttime light pollution among adults in Poland. There is an urgent need to promote the prevention of environmental hazards like light pollution among adults in Poland. Int J Occup Med Environ Health. 2025;38(5)