Recessed Light Calculator

A free browser-based preliminary general-lighting planner for rectangular rooms. Enter room and fixture inputs, compare light-count and 2D spacing layouts, and export PNG or CSV. The separate lumen calculator allows editable utilization and maintenance assumptions. No account or purchase required. It is not a site measurement, complete electrical design, installation approval, or CAD/IES simulation. Cover image: an illustrative concept sketch from our living-room guide, not a site survey.