LIGHTS ORDNER is a critical appraisal of plurality, diversity, and hybridity. The participatory intervention invites school groups to transform discarded folders into slide projectors. Participants build their own DIY projectors from provided kits, engaging directly with material culture and practical STEM concepts like optics and electronics. Using projectors, students can explore slides assembled from second-hand shops, schools, institutions, and private collections around Germany—offering a multifaceted panorama of the cultural and social German public. Students are invited to step into the role of the artist as they critically examine this archive. Through the creation of personal slides and contribution of their own voices, participants address the absences and silences palpable in the source material.