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Case study · Networked lighting controls

Eleven exam rooms, used part of the day

6,200 sq ft of medical office in Midtown — already LED, no controls, every room lit through the clinic day.

Medical office · Midtown Manhattan · 16 zones

Medical suite control zone planAn irregular medical tenant floor with waiting and reception, a corridor, eleven exam rooms of differing sizes, a lab, restroom and office, each on its own control zone. Three exam rooms are in use and lit; the rest are unlit until switched on.MEDICAL SUITE — 16 ZONES · MID-MORNINGBuilding corenot in tenancyWaiting + receptionStorefront glazingDeskCorridor — 30%Nurse stationExam 01OffExam 02Exam 03OffExam 04OffExam 05WCStrExam 06OffExam 07OffExam 08Exam 09OffLab / drawExam 10OffExam 11OffOffice / breakFull / dimmed / offFixture + controllerControl deviceThree rooms in use out of eleven. The corridor never goes dark, and nothing switched itself on.
Figure 1 — Mid-morning: three exam rooms occupied and lit, the rest off.
Exam room controlAn exam room in plan with casework, sink, exam table, door and wall station, two fixtures, and a ceiling sensor whose coverage fills the room. Below, one appointment drawn as a timeline: switched on at the wall, held while occupied including twenty-six minutes without motion, and off by itself thirty minutes after the room empties.EXAM ROOM — TYPICAL OF ELEVENCasework + sinkExam tableDoorWall stationCeiling sensorHow the room runsOn at the wall stationNothing turns on as staff pass the open door.Held while occupiedThe sensor keeps the room on through the visit.Off by itself30 minutes after the room empties.One appointment, drawn to time:On — at the wallRoom emptiesOff, by itselfNo motion 26 min — stays on30-min hold0 min4590Fixture + controllerCeiling sensorWireless meshControl deviceRooms are used in bursts through the clinic day. Between patients they sit unlit, automatically —and a still patient never times the room out.
Figure 2 — Manual-on control, 30-minute hold, sensor coverage to the walls.
Schedule

Zone by zone

Sixteen zones across clinical, front and back of house.

ZoneSpaceHrs/yrControlWhy
Z-1Reception and waiting3,100Scenes + daylight dimmingGlass-fronted; daylit most of the day
Z-2 – Z-12Exam rooms ×113,100Manual-on, 30-min holdBurst use; no nuisance switching
Z-13Corridors3,10030% standby, occupancy to fullConstant brief traffic
Z-14Lab and draw station3,100Extended holdLonger dwell than exam rooms
Z-15Restrooms3,100Occupancy, full offNo standby needed
Z-16Office and break room3,100Occupancy + daylightIntermittent use, perimeter daylight
Commissioned

Sequence of operations

How each zone is programmed.

SpaceSequenceNote
Exam rooms ×11manual-on · 30-min holdNo auto-on; no mid-visit drop-outs
Waiting + receptionscene control · daylight dimmingSteps down after 5pm
Corridors30% standby · occupancy to fullNever dark between rooms
After hoursauto-off at close · 2-hr overrideOverride expires on its own
Calculated

Annual impact

5,040kWh avoided / yr
$1,260saved / yr at $0.25/kWh
2.0 t
CO₂ avoided / yr
≈220
gallons of gasoline equivalent
≈33
tree seedlings grown 10 years

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