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Case study · Networked lighting controls

Six suites, one daylit work floor

18,400 sq ft office floor in the Financial District — six tenant suites and an open common area, already LED, lit through the lease day with the blinds up.

Office · Financial District · 14 zones

Office floor control zone planAn office floor with six tenant suites along the top, a corridor, and an open common work area with glazing along the bottom. Three fixture rows run parallel to the glass: the row nearest the windows dimmed to forty percent by daylight, the middle row at seventy, the core row at full.OFFICE FLOOR — SIX SUITES · PERIMETER DAYLIGHTSuite 01OffSuite 02Suite 03OffSuite 04OffSuite 05Suite 06OffCorridor — 30%Row C — 100% · coreRow B — 70%Row A — 40% · daylightCurtain wall — full-height glazingDaylight sensor100 / 70 / 40% outputFixture + controllerSensorControl deviceThe rows nearest the glass give back what the sun provides. The core row holds setpoint all day.
Figure 1 — Row A at 40% against the glazing, Row B at 70%, the core row holding setpoint.
Schedule

Zone by zone

Fourteen zones: one per suite, three daylight rows, and the shared spaces.

ZoneSpaceHrs/yrControlWhy
Z-1 – Z-6Tenant suites ×63,200Occupancy + schedule per suiteTenants keep their own hours
Z-7 – Z-9Common floor, three rows3,200Daylight dimming by rowFull-height glazing on the south wall
Z-10Corridor3,20030% standby, occupancy to fullConstant brief traffic
Z-11 – Z-14Conference, pantry, storage, WCs3,200Occupancy, full offIntermittent use
Commissioned

Sequence of operations

How each zone is programmed.

SpaceSequenceNote
Suites ×6occupancy · per-suite scheduleEach tenant runs their own hours
Common rows ×3daylight dimming · 40/70/100%Rows follow the glazing, not each other
Corridor30% standby · occupancy to fullNever dark between suites
After hoursauto-off at close · 2-hr overrideOverride expires on its own
Calculated

Annual impact

15,660kWh avoided / yr
$3,915saved / yr at $0.25/kWh
6.2 t
CO₂ avoided / yr
≈690
gallons of gasoline equivalent
≈100
tree seedlings grown 10 years

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