ALS: Advanced Ligh/ng Controls 4/3/14 ADVANCED LIGHTING
SOLUTIONS WORKSHOP
Advanced Lighting Controls
INTERIOR LIGHTING CONTROLS
J. L. Fe=ers, C.L.E.P. 1 ALS: Advanced Ligh/ng Controls 4/3/14 BI-LEVEL SWITCHING
•  2 discrete levels of light
–  NOT including off
•  Required by some energy-efficiency
codes
•  Methods:
–  Rewire alternate fixtures – not usually costeffective
–  Switching device – “half-light”
•  http://gofunctionalgreen.com/product-category/
light-control/
–  In-board/Out-board switching
•  2 wall switches
–  Bi-Level dimming ballasts
•
•
•
•
2 switched inputs
Ex1: Sylvania Quick-Step
Ex2: Advance (Philips Electronics) Step-Dim
Ex3: GE Ultramax Bi-Level dimming ballast
•  Can be manual or automatic control
–  Bi-level occupancy/vacancy sensors
BI-LEVEL SWITCHING
•  2 discrete levels of light
–  NOT including off
•  Required by some energy-efficiency
codes
•  Methods:
–  Bi-Level dimming ballasts
•
•
•
•
J. L. Fe=ers, C.L.E.P. 2 switched inputs
Ex1: Sylvania Quick-Step
Ex2: Advance (Philips Electronics) Step-Dim
Ex3: GE Ultramax Bi-Level dimming ballast
2 ALS: Advanced Ligh/ng Controls 4/3/14 CONCEPTS IN COMMERCIAL
LIGHTING CONTROL
•  Efficient lighting control offers significant energy-saving opportunities
–  Most buildings today are over-lighted because there is enough daylight in the
space; or lights are set to a higher level than appropriate for the people inside; or
spaces are lighted even though they are unoccupied.
–  This wastes energy, creates discomfort, and reduces productivity.
–  Despite the fact that most lighting is energy-efficient fluorescent, the numberone source of energy consumption in any building or school is still LIGHTING
•  Source: Energy Information Administration, 2003 Commercial Buildings Energy
Consumption Survey, released September 2008
ADVANCED ELECTRONIC
TIME SWITCHES
•  365 day astronomic time switch
•  Independent programming for each day
•  For applications where load switching
differs frequently
•  Up to 4,000 preset setpoints or events
•  Easily programmed; “super” cap backup
•  Remote control & monitoring via
Ethernet connection
•  Future upgrades through in-field
firmware updates & relay module
expansion
J. L. Fe=ers, C.L.E.P. ET90000
www.intermatic.com
3 ALS: Advanced Ligh/ng Controls 4/3/14 LIGHTING CONTROL STRATEGIES
Scheduling: Lights automatically turn off or are dimmed at
certain times of the day or based on sunrise or sunset.
Occupancy/Vacancy Sensing: Automatically turning lights off
when people vacate the space.
Multi-level Lighting/Dimming: Providing users one or more light
levels than full-on and full-off.
Daylight Harvesting: Automatically adjust light levels based on
the amount of daylight in the space.
7
SOURCE: LUTRON.COM
ADVANCED ELECTRONIC
TIME SWITCHES
•  365 day astronomic time switch
•  Independent programming for each day
•  For applications where load switching
differs frequently
•  Up to 4,000 preset setpoints or events
•  Easily programmed; “super” cap backup
•  Remote control & monitoring via
Ethernet connection
•  Future upgrades through in-field
firmware updates & relay module
expansion
J. L. Fe=ers, C.L.E.P. ET90000
www.intermatic.com
4 ALS: Advanced Ligh/ng Controls 4/3/14 Light Control Strategies LIGHTING
CONTROL STRATEGIES
High end trim/Tuning: Set target light level based on occupant
requirements in the space.
Personal Light Control: Allow users in the space to select the
correct light levels for the desired task.
Controllable Window Shades: Allows users to control daylight for
reduced solar heat gain and glare.
Demand Response: Reducing lighting loads at times of peak
electricity pricing.
Plug-load Control: Automatically turning task lighting and other
plug loads off when they are not needed.
SOURCE: LUTRON.COM
9
MYTH: KEEPING THE LIGHTS ON IS
CHEAPER THAN TURNING THEM OFF
FOR BRIEF PERIODS
•  Based on myth of “high starting energy” for starting fluorescent
lamps on magnetic ballasts
–  In-rush current
•  Busting the Myth
–  Switching off fluorescent lamps when not in use saves energy, extends overall
lamp life (service life), and reduces maintenance cost
•  Re-lamping labor & lamps
–  Ex: Turning off T8 lamps 12 hrs/day, decreases avg rated lamp life, BUT –
service life is extended
•  ~ 7 yrs when switched off half time vs. 4 yrs continuous
•  Negligible starting energy
J. L. Fe=ers, C.L.E.P. 5 ALS: Advanced Ligh/ng Controls 4/3/14 OCCUPANCY SENSING
•  Greatest energy savings achieved with any lighting
fixture is when the lights are shut off
•  Minimize wasted light by providing occupancy
sensing or vacancy sensing
SOURCE: LUTRON.COM
PASSIVE INFRARED (PIR)
TECHNOLOGY
•  Reacts only to body heat
•  Sense occupancy by detecting difference
in body heat & background
–  Fan patterns created by lens
•  Sensors need to “see” area to control
–  Movement across field of view easier to
detect than to/from
–  Ceiling mounting more effective
•  Sensors use low-voltage to operate
relays that control lighting system power
J. L. Fe=ers, C.L.E.P. 6 ALS: Advanced Ligh/ng Controls 4/3/14 ULTRASONIC TECHNOLOGY
R
T
•
•
•
•
•
Volumetric detectors
Transmit sounds above range of human hearing
Senses shift in frequency of reflected waves
360 degree coverage
Most sensitive to small movement close to detector (10-20 ft)
–  Sensitivity reduced at edges of controlled area (40-50 ft)
–  Add sensors to get better coverage
DUAL-TECHNOLOGY SENSORS
•  Uses two technologies
–  Usually PIR & Ultrasonic
•  Can be set to operate:
–  Either technology sensing turns
on lights
–  Both technologies must sense to
turn off lights
–  Only one technology needed to
keep lights on
•  More effective than single
technology sensors
–  Prevents “false offs”
J. L. Fe=ers, C.L.E.P. 7 ALS: Advanced Ligh/ng Controls 4/3/14 VACANCY SENSORS
•  Like an occupancy sensor operated in “manual
on” “auto-off” mode
•  Saves more energy than occupancy sensors
–  Many situations where there is brief occupancy don’t
need lights on
•  Janitor visits to dump waste basket
•  Colleague visits to deliver papers
•  Required by California Title 24
WIRELESS OCCUPANCY SENSORS
•  Ceiling mounted PIR occupancy
sensors that communicate with
wall-box unit (or wireless
relays) using RF
•  Requires NO hard-wired
electricity
•
Ideal for retrofit applications
•  Lutron uses long-life battery
•  Ideal for dimming applications
•  Leviton uses no battery
•  PV cells in sensor charges
capacitor
J. L. Fe=ers, C.L.E.P. 8 ALS: Advanced Ligh/ng Controls 4/3/14 LOW-POWER WIRELESS RELAYS
•  Relays have RF receivers
onboard
•  Allows creation of independent
lighting zones/sub-zones in a
wireless network
•  Precise control of individual
fixtures
•  Simultaneous control of
multiple fixtures
Source: www.leviton.com
BATTERY ISSUE
•  NO batteries
–  EnOcean Alliance
•  Sensors & switches self-powered by energy drawn by movement &
light (a.k.a. harvested energy
•  > 350 companies
•  > Projects in 37 countries
–  Hundreds of thousands of projects
•  Lower cost
–  No wiring - save $50 - $100/ft wiring cost
•  Fewer wiring errors
–  Less disruptive to work environments
•  Ideal for retrofit applications
–  Reduced maintenance cost
http://www.enocean-alliance.org/
J. L. Fe=ers, C.L.E.P. 9 ALS: Advanced Ligh/ng Controls 4/3/14 DAYLIGHT HARVESTING
•  Many commercial spaces have enough daylight
flowing into it that the amount of electric lighting can
be reduced
•  Cut back on the amount of electric lighting by
implementing technologies that can measure and
account for daylighting
SOURCE: LUTRON.COM
CONTINUOUS DAYLIGHT
HARVESTING CONTROL
•  Energy management strategy that uses electronic lighting
control to continuously & automatically adjust the output of
electric lighting based on the amount of daylight entering a
space to allow a desired light level to be maintained
•  Control must meet visual & comfort needs of occupants as
daylight varies over the day and by season
•  Problems can occur when occupants are disturbed by low
light levels or sudden changes in light level
–  Use fade control to slow response
•  System control elements
–  Electronic dimming ballasts
–  Photo-sensors (w/integrated fade control)
•  Low-voltage control
J. L. Fe=ers, C.L.E.P. 10 ALS: Advanced Ligh/ng Controls 4/3/14 CONTINUOUS DAYLIGHT
HARVESTING CONTROL
Target Light Level at 40 FC
SOURCE: LUTRON.COM
CLOSED LOOP CONTROL
•  Sensors placed inside
space, above work
surface
•  Measures light level in
narrow viewing angle
•  Adjusts light level up or
down to maintain
desired light level
•  Affected by both electric
light & daylight
Daylight Photosensor Use (LRC)
J. L. Fe=ers, C.L.E.P. SOURCE: LUTRON.COM
11 ALS: Advanced Ligh/ng Controls 4/3/14 CLOSED LOOP DISADVANTAGES
1.  Can only control fixtures that are contributing to the field of
view - One sensor per task surface
-  Customer would have to buy far more sensors to
cover the same area
2.  Requires strict sensor placement guidelines
–  Must be placed directly above task surface
3.  Sensor cannot distinguish between daylight fluctuations and
changes of surface reflectance
This means that if the material under the sensor changes –
changing the surface reflection – the sensor may respond by
adjusting the lights – even when the amount of daylight remains
the same
Solution: Combination of Closed Loop & Open Loop control
(partial open loop)
SOURCE: LUTRON.COM
OPEN LOOP
Open loop sensors look only at daylight and are usually placed
outside the space
Wide field of view
Not affected by the electric lights they control
Disadvantage: Exterior field of view does not account for what
is actually happening in the space
SOURCE: LUTRON.COM
J. L. Fe=ers, C.L.E.P. 12 ALS: Advanced Ligh/ng Controls 4/3/14 PHOTOSENSORS
•  Small, inconspicuous, ceiling-mounted devices
•  Contain optics, light-sensitive element
–  photo-diode, phototransistor, photoconductive cell
•  Provide control signals to dimming ballasts
–  Output is LV, dc signal (0 – 10 v)
–  Proportional to light falling on it
•  From daylight & fluorescent system (closed loop system)
HOW DO DLH SYSTEMS PERFORM
COMPARED WITH EXPECTATIONS?
•  Research project
–  Wisconsin Energy Center monitored 20 DLH projects in MN
& WI offices & public spaces
•  Most DLH projects fall short of performance goals
–  Median system saving 23% (including impacts on HVAC)
–  About half not meeting expectations
–  4 of 20 spaces studied had NO savings
•  Best practices suggest that successful automatic DLH
controls require significant commissioning effort to
reach full energy savings potential
–  Including calibration & functional testing
Source: www.ecw.org
J. L. Fe=ers, C.L.E.P. 13 ALS: Advanced Ligh/ng Controls 4/3/14 MARKER FOR INFO FROM LD+A
PUBLISHED STUDY ON DLH
LOW-VOLTAGE CONTROL
•  LV leads allow creation of
control zones independent of
power zones
•  No need to rewire power
wiring
•  Connect LV leads directly
from photo-sensor to ballast
•  Daisy-chain from one sensor
to many ballasts
hot
Photo-sensor
neutral
daisy-chain
to other
Vio/Greydimming
ballasts
–  Max number determined by
manufacturer (check catalogs/
websites)
J. L. Fe=ers, C.L.E.P. 14 ALS: Advanced Ligh/ng Controls 4/3/14 Sensor Placement Guidelines SENSOR
PLACEMENT
GUIDELINES
Mount the sensor at a distance of 1-2 window heights in from
the window wall, pointing towards window.
h h Window height = h •  Avoid placing the sensor too close to a window. This can
flood the sensor with daylight and produce unexpected
behavior on the work surface + a lot more.
SOURCE: LUTRON.COM
PERSONALIZED CONTROL
•  Many “green” technologies generate
energy savings on the basis that some
level of performance and
convenience must be sacrificed
•  Providing personalized control of the
lighting allows occupants to optimize
their performance & save energy in
the process
SOURCE: LUTRON.COM
J. L. Fe=ers, C.L.E.P. 15 ALS: Advanced Ligh/ng Controls 4/3/14 Energy Savings in a Typical Office Building NO LIGHTING CONTROL
SOURCE: LUTRON.COM
Energy Savings in a Typical Office Building SCHEDULING CONTROL
SOURCE: LUTRON.COM
J. L. Fe=ers, C.L.E.P. 16 ALS: Advanced Ligh/ng Controls 4/3/14 OCCUPANCY SENSING
Energy Savings in a Typical Office Building SOURCE: LUTRON.COM
TUNING/HIGH-END TRIM
Ligh/ng Power Used 1W/sf 12 midnight J. L. Fe=ers, C.L.E.P. consump/on = 8.76 kWh / sf Annual energy consump/on ≈ 5 kWh / sf (scheduling) Annual energy consump/on ≈ 4 kWh / sf (occ.sens.) Annual energy consump/on ≈ 3 kWh / sq (+tuning) Annual energy 12 n oon 12 midnight Time SOURCE: LUTRON.COM
17 ALS: Advanced Ligh/ng Controls 4/3/14 DAYLIGHT HARVESTING
Energy Savings in a Typical Office Building SOURCE: LUTRON.COM
CONCEPTS IN COMMERCIAL
LIGHTING CONTROL
•
Advanced Lighting Guideline, New Buildings Institute, Inc., 2003
SOURCE: LUTRON.COM
J. L. Fe=ers, C.L.E.P. 18 ALS: Advanced Ligh/ng Controls 4/3/14 Lighting Added Benefits
–  Reduction of lighting reduces cooling load (HVAC)
TOTAL BUILDING ENERGY SAVINGS
Total Energy Usage
120
100
Annual kWh
15%
80
Energy
Savings
30%
60
Lighting
40
Air Conditioning
20
Plug-in, other
0
ASHRAE 90.1
High-end Trim/
Tuning
Occupancy
Sensing
Daylighting
Personal Control
Lighting Control Strategy
SOURCE: LUTRON.COM
J. L. Fe=ers, C.L.E.P. 38
19 ALS: Advanced Ligh/ng Controls 4/3/14 DEMAND RESPONSE CONTROL
DEMAND RESPONSE CONTROL
Demand Response (DR)
–  Manage customer electricity consumption in response to supply
conditions, critical times or market prices.
–  A different concept from energy efficiency, which means using less
power to perform the same tasks.
SOURCE: LUTRON.COM
J. L. Fe=ers, C.L.E.P. 20 ALS: Advanced Ligh/ng Controls 4/3/14 DEMAND RESPONSE CONTROL
Demand Response (DR)
–  Demand response can involve curtailing power used or by starting onsite generation.
–  Current demand response schemes often implement the use of control
systems to shed loads. Load shed is the action to Demand Response
–  Most DR programs usually require a minimum of 100 KW to
participate.
Normal Usage
23:00:00
22:00:00
21:00:00
20:00:00
19:00:00
18:00:00
17:00:00
16:00:00
15:00:00
14:00:00
13:00:00
12:00:00
11:00:00
10:00:00
09:00:00
08:00:00
07:00:00
06:00:00
04:00:00
04:00:00
03:00:00
02:00:00
01:00:00
Y-Axis
Actual Usage with
Demand Response
00:00:00
Electric Usage (KW)
Curtailment
Period
Time
SOURCE: LUTRON.COM
DEMAND RESPONSE CONTROL
Green Regulations
ASHRAE 189.1
•  Section 7.4.5.1 Peak Load Reduction/Load Factor. Building projects shall
contain automatic systems such as demand-limiting or load shifting to reduce
electric peak demand of the building by not less than 10%. Standby power
generation shall not be used to achieve the reduction in peak capacity.
INTERNATIONAL green CONSTRUCTION CODE® (IgCC®)
•  Section 605.4 The Auto-DR system shall be capable of reducing total
connected power of lighting in Group B, office, spaces by at least 30 percent.
Exceptions:
1. Police stations, prisons, fire stations, hospitals, and any other first-responder
facilities;
2. Luminaires on emergency circuits;
3. Luminaires located in emergency and life safety areas of a building;
4. Lighting in buildings that are less than 5,000 square feet in total area; and
5. Luminaires located within a daylight zone which are dimmable and
connected to automatic daylight controls.
SOURCE: LUTRON.COM
J. L. Fe=ers, C.L.E.P. 21 ALS: Advanced Ligh/ng Controls 4/3/14 DEMAND RESPONSE CONTROL
Commercial Electricity Usage
–  Load Shed Reduction Strategies
•  Lighting and HVAC account for over 2/3 of all electricity in
commercial buildings with lighting being the biggest contributor
•  Lighting and HVAC should be the number 1 & 2 load shed strategies
in a commercial building
•  HVAC accounts for more of the total load during demand events so
lighting is often an afterthought or forgotten entirely as a load shed
strategy
SOURCE: LUTRON.COM
DEMAND RESPONSE CONTROL
Commercial Electricity Usage
–  Many times lighting is not employed in load shed strategy because:
•  Lighting does not have a direct correlation with demand events
•  Minimally influenced by outside conditions
–  Employed daylighting has a minor change with fluctuations of sunrise and sunset
•  Lighting is very close to linear monthly usage
SOURCE: LUTRON.COM
J. L. Fe=ers, C.L.E.P. 22 ALS: Advanced Ligh/ng Controls 4/3/14 DEMAND RESPONSE CONTROL
Benefits of Lighting as a Load Shed Strategy
–  Lighting may be a smaller load at demand response time but
•
•
•
•
•
It is close to linear over time
Response is instantaneous and controllable
No recovery time
Effect is not or not easily noticed
Little or no loss of productivity
–  Lighting is the easiest strategy
•  Little management
•  Less productivity impact
•  Easier to predict
SOURCE: LUTRON.COM
DEMAND RESPONSE CONTROL
Automatic Systems for Demand Response
•  Lighting systems load shedding for DR events
•  Vary reduction time and recovery time
•  Have the granularity of small changes within work spaces (1% - 100%)
•  Simple user interface for setup and initiation
•  Smarter Grid = Automated Demand Response Auto-DR
•  Receive external signals (BACnet, Serial, contact closures, etc.)
SOURCE: LUTRON.COM
J. L. Fe=ers, C.L.E.P. 23 ALS: Advanced Ligh/ng Controls 4/3/14 SSL (LED) DIMMING
DIMMER COMPATIBILITY
CHALLENGES
•  Many different approaches optimized for:
–  Low cost
–  Simple control of an incandescent lamp
Source: www.iwatt.com
J. L. Fe=ers, C.L.E.P. 24 ALS: Advanced Ligh/ng Controls 4/3/14 WIDE RANGE of WALL DIMMERS
•  Many dimmer types:
–  Leading-edge
–  Trailing-edge
–  Smart dimmers
–  Universal dimmers
•  Dimmer impedance and power level
also vary
–  R, R-L, R-C
–  400W, 600W etc
•  All designed to drive resistive loads
Source: www.iwatt.com
DIMMERS and FLICKER
Un-balanced
and multi-fire
•  Potential sources of flicker:
–  Imbalance between each half cycle
–  Line voltage variations and distortion
Source: www.iwatt.com
J. L. Fe=ers, C.L.E.P. 25 ALS: Advanced Ligh/ng Controls 4/3/14 “14 QUESTIONS” CHECK LIST for
DIMMABLE DRIVERS
Check
Questions
o
Can you support leading-edge, trailing-edge or smart dimmer?
o
Can you support universal line from 110V to 230V?
o
Is there flicker when the AC line is distorted? Or lightning surge?
o
Is there any shimmer or strobe affect?
o
How much inrush current? And peak current at AC cycle?
o
How much is the outrush current on LEDs?
o
How much is the power consumption at worst condition? Load ?
o
How about audible noise?
o
How many LED lamps can be paralleled?
o
How many LED lamps can be driven by one dimmer without flicker?
o
If the LED lamp cannot support dimmer, what is consequence? Shut down?
o
Does the dimming curve meet SSL-6?
o
Does the solution meet the Energy Star? PF>0.7, PF>0.9
o
What is your expected life?
Source: www.iwatt.com
FINELITE REPORT
•  “Flicker in LED Luminaires”
–  By Terry Clark, Chairman & Chief Technology Officer
•  Presence of flicker in LED lighting applications is
dependent on light modulation characteristics of the LED
power supply (i.e. driver)
•  2 types of LED drivers to choose from
–  PWM (Pulse Width Modulation)
–  CCR (Constant Current Reduction)
Source: http://www.finelite.com/download_files/white-paper/FL_Flicker_In_LED_Luminaires_WhitePaper.pdf
J. L. Fe=ers, C.L.E.P. 26 ALS: Advanced Ligh/ng Controls 4/3/14 FINELITE FLICKER REPORT
•  Pulse Width Modulation (PWM) power supplies:
–  Dim by rapidly switching current to LEDs on & off
–  Ratio of time on to time off determines perceived brightness
–  When dimmed, flicker can become apparent
Source: http://www.finelite.com/download_files/white-paper/FL_Flicker_In_LED_Luminaires_WhitePaper.pdf
FINELITE FLICKER REPORT
•  Constant Current Reduction (CCR) power supplies:
–  Dim by reducing amount of current delivered to LEDs
•  LEDs do not turn on & off
–  May exhibit ripple on output current signal
Source: http://www.finelite.com/download_files/white-paper/FL_Flicker_In_LED_Luminaires_WhitePaper.pdf
J. L. Fe=ers, C.L.E.P. 27 ALS: Advanced Ligh/ng Controls 4/3/14 FINELITE FLICKER REPORT
•  Report describes 4 ways to check flicker in LED power supplies
–  Waveform analyzer - to observe exact wave shape
–  Flicker checker wheel to observe visible pattern
–  Wave an object under the light source to see if see multiple images
•  Pencil
–  Mock up of the space with all sources & dimmers to experience first hand
•  “Best way”
•  Report also describes 4 ways to measure level of flicker (per LRC)
Source: http://www.finelite.com/download_files/white-paper/FL_Flicker_In_LED_Luminaires_WhitePaper.pdf
DOE REPORT ON DIMMING
•  CALiPER testing & Gateway demonstrations showing dimming of
LEDs is still a challenge
–  Especially with compatibility
•  “Dimming LEDs with Phase-Cut Dimmers: The Specifier’s Process
for Maximizing Success”
•  Report offers general guidance intended to reduce the likelihood of
compatibility-related dimming problems
–  Also provides specific, step-by-step procedures for designing phase-controlled
LED dimming on new & existing projects
–  Examples provided by a Gateway demonstration - Burden Museum, Troy, NY
•  “Excellent-quality LED dimming with phase-control dimmers can be
achieved, BUT requires dimming mockups or diligent research into
compatibility - - ”
•  “With time, LED sources, their components, & dimming systems
will evolve & improve, but until then, this report can serve as a
useful reference.”
Source: http://lightingcontrolsassociation.org/does-jim-brodrick-on-phase-cut-dimming-of-leds/
J. L. Fe=ers, C.L.E.P. 28 ALS: Advanced Ligh/ng Controls 4/3/14 EXTERIOR LIGHTING CONTROLS
PHOTOCELLS
•  Respond to ambient light
•  Cadmium-sulfide (CdS)
–  Inexpensive dusk-to-dawn controls
–  Change sensitivity over time
•  Erodes savings
•  “Electronic” photocell
–  Solid-state silicon sensor
–  6 year warranty
•  Ex: American Electric Lighting Model DPN
•  Delay feature prevents rapid cycling
during cloudy days or lightning
•  Aim North
–  In northern hemisphere
J. L. Fe=ers, C.L.E.P. 29 ALS: Advanced Ligh/ng Controls 4/3/14 PHOTOCELL DRIFT
•  Cadmium sulfide (CdS) cells
drift mainly due to self-heating
–  EX: When installed in fixture that runs hot
•  >70C = 158F
•  In 18 months, can drift enough to
cause additional burn time of 16 min/day
•  Not usually noticeable to casual observer
–  Net result: ~ 100 hrs/yr additional on time
–  A significant waste
Source: DG-13-98 Guide for the selection of Photocontrols for Outdoor Lighting Applications
SOLUTION: SILICON CELLS
•  Silicon cells in electronic photocells do not drift
•  Turn-off and turn-on settings do not deteriorate
•  Can save 1 to 5% compared with CdS cells
Source: DG-13-98 Guide for the selection of Photocontrols for Outdoor Lighting Applications
J. L. Fe=ers, C.L.E.P. 30 ALS: Advanced Ligh/ng Controls 4/3/14 DAYBURNERS
•  Definition: Controlled outdoor
fixtures, whose lamps burn during
the day
•  Most U.S. outdoor lighting
installations use “fail-on” type
photocells
•  Photocells fail on and cause
dayburners and
–  Can add to daytime demand when not
replaced
•  Adds 25 to 75 burn hours/yr
–  Depends on how fast maintenance
responds
Solutions: Use “fail-off”
photocells or replace
“fail-on” photocells
immediately upon failure
Source: DG-13-98 Guide for the selection of Photocontrols for Outdoor Lighting Applications
STANDALONE PROGRAMMABLE
PHOTOCELLS
Turns On at dusk
Off at preset time
Back On at preset time
Off at dawn
Built-in Smart Clock
Synchronizes with
NIST Atomic Clock WWVB
for Ultra-Precise
Lighting Curfew Scheduling
J. L. Fe=ers, C.L.E.P. 31 ALS: Advanced Ligh/ng Controls 4/3/14 INTELLIGENT WIRELESS CONTROL
& MONITORING SYSTEMS
INTELLIGENT NETWORK
CONTROL: ROAM
•  Streetlight or parking lot monitoring system
•  Enables owner/operators to remotely
monitor, control & measure fixture
performance
•  Uses wireless network to maximize savings
–  Energy, maintenance, service efficiency
•  Individual fixture control, group control,
automated scheduling & dimming
•  ROAMview – less than 2,000 fixtures,
single site, pre-packaged server, easy retrofit
•  ROAM – unlimited fixtures, self-hosted
(Enterprise) or centrally hosted (Concierge)
Source: www.acuitybrands.com/products/controls/roam
J. L. Fe=ers, C.L.E.P. 32 ALS: Advanced Ligh/ng Controls 4/3/14 PARKING LOT
BEFORE – 250 WATT MH (295 WATTS)
Actual photograph - Not a rendering
©2013 Acuity Brands
PARKING LOT
LED DIMMED TO 45% POWER
LED Full Power
LED @ 45% Dimmed
144 Input Watts
64 Input Watts
(50% Savings)
(78% Savings)
Actual photographs – Not renderings
J. L. Fe=ers, C.L.E.P. ©2013 Acuity Brands
33