The luminous environment is one of the most important physical parameters in a teaching space (classroom) due to its impact on the intellectual performance of students. their health and their behavior. The aim of this study is to evaluate the luminous environment in university classrooms located in Constantine. the main university hub of the East of Algeria. https://www.bekindtopets.com/hot-mega-Jeffers-Economy-600D-Royal-Blue-Teal-Plaid-Horse-Blanket-super-sale/