Plan a rectangular room's recessed lights with an editable 2D layout.
About Recessed Light Calculator
Free browser-based planning calculator for a rectangular room's general lighting. Adjust room dimensions, fixture lumens, target illuminance and utilization/maintenance assumptions, review a 2D light layout, and export PNG or CSV. Supports feet/metres and lux/foot-candles. An initial planning model, not site photometry, an electrical design or an installation approval.
✓ VerifiedOct 18, 2026
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