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Spiral Stair Studio

Location
California
Type
Residential
Year
2026

A two-level studio building where light carries up a spiral stair: adjustables wash the stair from the entry, step lights mark the treads, and downlights tie the two floors together. The rec room and art studio are layered under a sloped ceiling, with motorized zoom heads for the art.

Scope
Two-level accessory structure: rec room, art studio, gym, garage and storage, with a spiral stair
Systems
Trimless downlights, wall washers, step lights, grazing tape in aluminum channel, recessed track

Layout and footcandles

The plan, and the light it delivers.

Footcandles
0102030405060+
Lower level illuminance plan in footcandles with isolux lines and per-room average and minimum labels.
Lower level lighting layout: downlights, wall washers, adjustable accents, surface linear and grazing tape across the entry, spiral stair, rec room, art studio, storage rooms and two powder rooms.
LayoutFootcandles
Lower levelDrag the handle to compare the layout with its footcandle study
Upper level illuminance plan in footcandles with isolux lines and per-room average and minimum labels.
Upper level lighting layout: downlights in the gym and work area, surface linear and grazing tape in the garage and farm storage, stair downlight.
LayoutFootcandles
Upper levelDrag 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 lux
RoomPlaneTarget lxAverage lxMinimum lxUniformity
Entry 100Floor10082250.31
Spiral Stair (lower flight)Floor1003312270.69
Stair LandingFloor1004002730.68
Hall (W.C. corridor)Floor100258710.27
Rec Room 1012.5 ft above floor1504351160.27
Art Studio 1022.5 ft above floor300375320.08
Storage/Utility 1032.5 ft above floor1509085950.66
Utility Closet 1092.5 ft above floor1002041100.54
Maintained values from the issued calculation report. Uniformity is minimum over average.

In the package

  • Lighting layout, lower levelE-01
  • Lighting layout, upper levelE-02
  • Illuminance plan, lower levelE-01L
  • Illuminance plan, upper levelE-02L
RCPIlluminanceCalc reportBOM

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