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Twelve Zone Retrofit

Location
Illinois
Type
Residential
Year
2026

A first-floor retrofit of a production home: 72 downlights in 12 control zones, every room traced from the plans and calculated with walls blocking light between spaces.

Scope
First floor
Systems
Tunable white trimless downlights, in-wall driver dimmers

Layout and footcandles

The plan, and the light it delivers.

Footcandles
01020406080+
First floor, footcandle study of the same plan, with room averages and minimums
First floor, lighting layout with every fixture placed and tagged
LayoutFootcandles
First floorDrag the handle to compare the layout with its footcandle study

Calculated results

Every room against its target.

Measured at the plane where the task happens: counters and desks at working height, halls and stairs at the floor.

Calculated maintained illuminance by room, in footcandles
RoomPlaneTarget fcAverage fcMinimum fcUniformity
Bedroom 012.5 ft above floor52270.33
Bathroom 012.5 ft above floor1034190.55
Bathroom 01 tub/showerFloor1019130.65
Bedroom 01 closet2.5 ft above floor1034210.61
VestibuleFloor523100.42
Living room2.5 ft above floor52060.3
Kitchen general3.0 ft above floor2046200.43
Kitchen island3.0 ft above floor5062350.56
Maintained values from the issued calculation report. Uniformity is minimum over average.

In the package

  • Lighting layout, first floorE-01
  • Illuminance plan, first floorE-01L
RCPIlluminanceCalc reportBOM

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