The rise of rock climbing is a global phenomenon. Seven out of ten bouldering gyms opened during this decade in Stockholm. With the increasing sports climbing population, the lighting condition of sports facilities should be a concern, especially since electricity demand growth in buildings has been remarkably rapid. However, not much research has been conducted regarding investigating the effect of artificial lighting on indoor bouldering users' experiences. This thesis investigates a balance between addressing sustainable development goals number 7.3 and maintaining users' experiences while exercising, taking Klätterverket Gasverket as a case study. Different research methods have been used to provide a pilot study to be explored by others, including literature review, semi-structured interviews, and empirical study.  This research has shown that it is hard to draw conclusions regarding the perceived qualities of light. The qualitative and quantitative results conclude that we can decrease electrical consumption in a situation that has sufficient daylight without sacrificing climbers’ experience.  Adjusting the distance between the luminaire and climbing wall can slightly improve the average illuminance level and user experience.