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Planning tool

Downlight layout calculator

Pick your room shape, enter its size and the downlight's beam angle. We space the lights so neighbouring beams meet 5 ft below the ceiling, for even light with no dark patches.

Room shape

Room size

Downlight

12downlights
4 × 3
Max spacing at 5 ft5.77 ft
Floor area240sq ft
Area per light20.0sq ft

Spacing = 10 ft × tan(beam angle ÷ 2). Lights per side = side ÷ spacing, rounded up, with half a spacing at each wall. Complex shapes are split into rectangles and each is laid out on its own.

Plan view · lit at 5 ft below ceiling

DownlightBeam edge at 5 ftZone join

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