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Recessed Light Calculator logo

Recessed Light Calculator

Estimate first-pass recessed fixture counts and spacing with a 2D room plan.

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Recessed Light Calculator
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What is Recessed Light Calculator?

I maintain Recessed Light Calculator, a free, no-login browser tool for initial recessed lighting layouts in rectangular rooms. Adjust room size, fixture lumens and assumptions, then inspect the estimated fixture count and 2D spacing. Export a draft as PNG or CSV. This is a preliminary planning tool, not electrical or photometric design.