Step by Step Street Lighting Simulation with ... - LED Light for you

Step by Step 

Street Lighting Simulation 

with OSRAM LEDs in DIALux

Agenda 

Page 

• Introduction and Install of DIALux 

• Import IES files of OSRAM LEDs 

• Quick Street Planning Wizard with DIALux 

• Step by Step – Design with OSRAM LEDs in DIALux 

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Event / Title | December 17, 2008 | Page 2 

SSL | Application Design Center Asia | V.Chen

What is special about DIALux 

• DIALux - a planning software for your project presentation. 

• Calculation: latest radiosity procedures, fast and always correct. 

• Results: Results can be printed out or transmitted as a pdf file. Each 

view and each rendering can be saved as a .jpg file. 

• Interactive 3-D visualization: Simply move around the room. 

• Visualization: Use of textures and furniture for realistic rendering. 

• Photo realism: with integrated raytracing module. 

• False colours: False colours provide quantitative analysis of 

complex geometries at a glance. 

• Movies: Walk through the photo realistic visualization of your light 

planning and send the film to your customer via email. 

• Interaction: Import and export: .dwg and .dxf files can be imported 

and exported with results after completion of the planning process. 

• DIALux Light: Easy to use, step-by-step lighting design. 



Free Download DIALux from website 

• Download the DIALux Setup (version DIALux 4.5.0.1 ) from homepage (www.DIAL.de or 

www.dialux.com) on your hard-disk. 

• Language available 

www.DIAL.de or www.dialux.com 

– deutsch 

– english 

– français 

– italiano 

– español 

– 中文 

• Download file size: 

about 250MB 



Online Update 

• If you have already installed old version of DIALux, you could use “ online update” to 

newest version. 

• In DIALux you will find a new menu named “Online”. 

• After selecting “Online Update…” DIALux automatically checks for newer versions of the 

software and for new online PlugIns. 

• But it will take some time to finish update. 



The DIALux User Interface 

• These three work areas enable effective and clearly arranged planning of lighting 

installation with DIALux. 

CAD-Window 

Task Pane 

Project manager 

with Inspector 



Agenda 

Page 





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.IES or .Idt files 

• .IES or .Idt file describe the 

information of light distribution, 

luminous flux, and power. 

• .IES or .Idt file are very small 

( only about 10K) compared to 

ray data (about 200M). 

• OSRAM OS provide both .IES 

(or .Idt) file and ray data of our 

LED products on website. 



Download .IES file of OSRAM LED from website 

• http://www.ledlightforyou.com 

• Tools & Downloads >> Optical Tools 



Import .IES file to DIALux 



Agenda 

Page 





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Quick Street Planning Wizard 

This wizard guides you through the quick planning for streets. 

• you will find the wizards in 

the menu File >> Wizard 



Street profile and illumination class 

• Street profile 

• Street name and maintenance factor are likewise inserted on this page. 

• In the following window you can fix the individual or combined valuation 

fields for the street. In order to define photometric requirements for the 

street, select an illumination class for every valuation field. 



Luminaire arrangement 

• In the window Luminaire arrangement you can select a luminaire and place this 

in an arrangement. (You need to import the IES file of OSRAM LEDs first, 

otherwise you can only select the existing traditional luminaire in DIALux) 

• You can optimize the arrangement parameters depending on the predefined 

photometric requirements. 



Start Calculation 

• Afterwards a final dialogue will appear automatically. If you activate the checkbox, the generated 

street will be calculated immediately. 

• Click on the Finish button and your street project will be displayed. 



Rotate 3D View 

Rotate 3D View; left-click and move the mouse 

while holding the mouse button pressed. 



3D light distribution Display 

Help Rays for Luminaires / 3D light distribution Display / Show false colors in CAD 



Show false colors in CAD 

• Display the 3D rendering in a false colour 

rendering 

• Easy to check the illuminance uniformity 

• Freely scaleable value ranges and definable 

colour gradients 



Agenda 

Page 





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Step 1: Collecting road information 

Street profile, width, N of lanes, coating… 

Information list before design: 

1. Street location and photos 

2. Width of street 

3. N of lanes 

4. Coating material 

5. Existing mounting height or pole distance 

Decide the road classification and required E av 

and U o 

according to street lighting standards 

Information needed for lighting simulation 



Step 2: Edit street in DIALux 

Arrangement of street component according 

to the road information. 



Step 3: Decide which LED (color bin and brightness group) 

• CCT: from 5000K-6500K (LW, LUW) 

• If need CCT from 4000K-5000K, can be mixed by LUW and LY. 

Golden DRAGON 

with Oval Lens 

Golden DRAGON Plus 

No need of secondary 

optical design 

Need lens or reflector 

Higher brightness 



Step 4: Change luminous flux 

You can change the luminous flux and power here. 

It’s related to how many LEDs in one lamp. 



Step 5: luminaire arrangement 

Normal methods of 

luminaire arrangement 

Lighting Class 

Single row 

Double row, 

with offset 

Double row, 

opposing 

• Single row 

• Double row, opposing 

• Double row, with offset 

Road information 

Uniformity 

W ≤ 6m 

N ≤2 

0.4~0.5 

W ≥ 8m 

N ≥2 

0.5~0.8 

W ≥ 16m 

N ≥4 

0.5~0.8 

! Rules 

of 

thumb 


will be decided based on 

• street profile 

• requirements 

Figure 

• For LUW W5JM, Double 

row, opposing was 

recommended. 



Step 6: Optimize arrangement parameters 

Optimize arrangement parameters 

• (1) Mounting Height: 6m~10m 

• (2) Overhang: 1m~2m 

• (3) Boom Angle: 10°~15° 

• (4) Boom Length: 1m~3m 

• (5) Pole Distance 

Boom Angle 

Mounting Height 

Boom Length 

• These parameter will be optimized 

according to street profile to achieve 

best performance: E av and U o . 

• If a certain Uo was required, the most 

economic mounting height and pole 

distance could be optimized. 

• Lower distance, longer pole distance 

could save energy and pole cost. 

Overhang 

(5)Pole Distance 

Lamp 



Step 7: calculation and simulation 

E av 

(lx) 

17 

E min 

(lx) 

8.6 

E max 

(lx) 

24 

Uo 

0.52 

E min 

/E max 

0.36 

Change to double row, offset 

Double row, opposing 

2 

Not so uniform, 

need to be improved 

1 

Optimized results 

3 

E av 

(lx) 

19 

E min 

(lx) 

16 

E max 

(lx) 

22 

Uo 

0.83 

E min 

/E max 

0.72 



Step 8: Save the selected output as PDF file 



Step 9: output design plan 




Step 10: output simulation results 

Isolines (E) 

Table (E) 

E av (lx) 

19 

E min (lx) 

16 

E max (lx) 

22 

Uo 

0.83 

E min /E max 

0.72 

Main results 



Thank you for your attention.

Step by Step Street Lighting Simulation with ... - LED Light for you

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