The introduction of LED street lighting has presented a new problem to the client and designer. Is the lantern solution the most energy efficient solution available and how good is the lantern we are using, or proposing?... Talk by Nick Smith IEng MILP MIES, Nick Smith Associates Ltd

1. How do you know if you’re using
the most energy efficient street
lighting?
Nick Smith IEng MILP MIES
Managing Director - Nick Smith Associates Ltd
Technical Director – Lighting Reality

2. The Design Process
• Choose a class
• Choose a Luminaire
– Wattage
– Lens setting
– Lumen package
– Drive current
#

3. The Design Process
1. Select benchmark lighting class from table
2. Do Risk Assessment & refer local policy
3. Adjust target level based on specific risks
4. Adjust target level for “white” light
5. Look at variable lighting options
#
Taken from BS5489

4. Table A5: Lighting classes for subsidiary roads with a typical speed of main user v ≤ 30 mph
Traffic Flow
Lighting class
Ambient luminance
Very Low
(E1)
Low
(E2)
Moderate
(E3)
High
(E4)
Busy S3 or P3 S3 or P3 S2 or P2 S2 or P2
Normal S4 or P4 S4 or P4 S3 or P3 S3 or P3
Quiet S5 or P5 S5 or P5 S4 or P4 S4 or P4
The Design Process
#

5. P class Photopic
illuminance
(lux) for Ra<60
Photopic illuminance (lux) for Ra ≥60 according to S/P ratio of lamp
0.23 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8
P1 15.0 15.0 14.3 14.0 13.7 13.4 13.1 12.8 12.6 12.3 12.1 11.8 11.6 11.4
P2 10.0 10.0 9.4 9.1 8.9 8.6 8.4 8.1 7.9 7.7 7.5 7.3 7.2 7.0
P3 7.5 7.5 7.0 6.7 6.5 6.3 6.0 5.9 5.7 5.5 5.3 5.2 5.0 4.9
P4 5.0 5.0 4.5 4.3 4.1 4.0 3.8 3.7 3.5 3.4 3.3 3.2 3.1 3.0
P5 3.0 3.0 2.6 2.5 2.3 2.2 2.1 2.0 1.9 1.8 1.7 1.7 1.6 1.6
P6 2.0 2.0 1.7 1.6 1.5 1.4 1.3 1.2 1.2 1.1 1.0 1.0 0.9 0.9
These values provide equal mesopic illuminance according to CIE recommended system for mesopic photometry assuming a surface
reflectance of 0.07.
LPS or HPS
lamp
S/P ratio and illuminance when Ra ≥60
Lamp with:
S/P ratio = 1.2
Ra ≥60
Lamp with:
S/P ratio = 2.0
Ra ≥60
ILP PLG03
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6. The Design Process
Using Lighting design software to
determine the right luminaire option
www.Agi32.com
www.lightingreality.com
www.dialux.com
www.relux.com
www.visual-3d.com/www.Autolux.us
Or Manufacturer specific
program
#

7. EN 13201‐5:2015
• Power Density Calculation
– Watts / lux / m2
– Power density indicator for an area divided into sub‐areas for
a given state of operation shall be calculated
– Consider variable spacing and levels
– Why do we need it?
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8. BS EN 13201‐5
• AECI – Energy Consumption Indicator
– kWh/m2
• The annual electricity consumption of a road lighting installation
depends on
– the period of time for which lighting is provided,
– the lighting class specified by the relevant lighting standard for each
lighting period,
– the efficiency of the lighting installation, when providing the necessary
lighting for each period,
– the way the lighting management system follows the change in visual
needs of road users,
– the parasitic energy consumption of lighting devices during the period
when the lighting is not needed.
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9. Another way to consider
www.ace.lighting
#From the developers of Lighting Reality

10. What is ACE
• Cloud based luminaire Intelligence tool
– Because it is Cloud based
• Not device or machine specific
• Not operating system specific
– Windows, Desktop or Windows Mobile
» Desktop
» Laptop
» Tablet
– Apple OS
– Mobile Apple IOS
» Ipad, or Iphone (If the screen is not too small)
– Android
» Tablet, or Phone (If the screen is not too small)
#
You log in to the software

11. ACE Architecture
Data Store
Photometry
Data
Scenarios
Results
Work Queue
Photometry
Manager
Scenario
Generator
Data
Export
Sales
Application
Evaluator
Application
3rd Party
Applications
ACE
Engine
#

12. What is ACE‐Stage 1
• Upload Photometric data
– IES, LDT, CIB or INR
– Tagging essential
• Application
• Manufacturer
• Product Name
• Body size
• Light Source
• Colour temperature
#

13. What is ACE‐Stage 1
– Pre process data and extract metadata
• Lumen package
• Wattage
• Lamp information
• Optic setting
• S/P Ratio
• Drive Current
• Prepare Polar curve / Cartesian curve
– Data is stored in a database, I will come back to this.

14. ACE Architecture
Data Store
Photometry
Data
Scenarios
Results
Work Queue
Photometry
Manager
Scenario
Generator
Data
Export
Sales
Application
Evaluator
Application
3rd Party
Applications
ACE
Engine
#
Tagging

15. What is ACE‐Stage 2
Additional standards due shortly.
Australian and New Zealand 1158 classes P and V
#

16. What is ACE‐Stage 2
#

17. What is ACE‐Stage 2
#
Tagging

18. What is ACE‐Stage 2
#

19. What is ACE‐Stage 2
#

20. ACE Architecture-Stage 3
Data Store
Photometry
Data
Scenarios
Results
Work Queue
Photometry
Manager
Scenario
Generator
Data
Export
Sales
Application
Evaluator
Application
3rd Party
Applications
ACE
Engine
#

21. What is ACE‐Stage 3
• You go home
• Calculations queued & automatically processed in the Cloud
• ACE Engines are created dynamically on demand
• Allows rapid scaling to meet calculation demand
• Equivalent calculation power to 100’s of computers in your
office
• Ace app will calculate scenarios in the cloud using as many
machines necessary to return the results in a reasonable time.
• Data added to a unique SQL database
#

22. ACE Architecture-Stage 3
Data Store
Photometry
Data
Scenarios
Results
Work Queue
Photometry
Manager
Scenario
Generator
Data
Export
Sales
Application
Evaluator
Application
3rd Party
Applications
ACE
Engine
#
SQL database

23. What is ACE‐Stage 3
• Calculation outputs
– Max Spacing
– Min spacing (for P classes)
– All quality figures (Average, Min, Max, Min / Ave etc)
– Luminaire wattage
• (Assuming it is has been entered into the photometric
file)
– Power Density
– Annual Energy Consumption Indictor
• Data added to a unique SQL database
#

24. What is ACE‐Stage 4
• 4 output options
– Data can be exported as an Excel spreadsheet via the
exporter
• All data
• Specific data (perhaps for a tender)
#

25. What is ACE‐Stage 4

26. What is ACE‐Stage 4
• 4 output options
– Data can be exported as an Excel spreadsheet via the
exporter
• All data
• Specific data (perhaps for a tender)
– Sales App can access the same data to filter the results based
on
• Spacing
• Wattage
• Source Flux
#

27. What is ACE‐Stage 4

28. What is ACE‐Stage 4
• 4 output options
– Data can be exported as an Excel spreadsheet via the
exporter
• All data
• Specific data (perhaps for a tender)
– Sales App can access the same data to filter the results based
on
• Spacing
• Wattage
• Source Flux
– Evaluator Application
– 3rd Party Applications (import data to you own SAP system)
#

29. Finally
• The future is still bright
– (depending what Class you choose)
• but a not really
• With many
– Luminaires
– wattage,
– lumen outputs and
– lens settings to choose from
• But you have a new tool to find the most
energy efficient solution
• THANK YOU
#
Steadfast and loyal
www.ace.lighting
From the developers of Lighting Reality