1. Optimizing Lighting OE119 Classroom with DIALux
software suite
Ilya Fedarovich
OE434 Non-Imaging Optics
04/21/2016

2. 2
Executive summary
 System/Component details
 This design model targets illuminaire improvement in terms of lighting, and
energy efficiency.
 Target illumination at working plane surface and energy efficiency must be
above the current conditions.
 Materials and equipment used – Rhopoint RIQ26 Glossmeter, Extech
SDL470 UVA UVC Light Meter, 25 meter tape measurer.
 Design objectives:
 Accurately model the room using DIALux design suite with materials and
equipment specified above.
 Run simulation and complete analysis using DIALux software.
 Determine weak points and improvement areas.
 Find equipment and materials that reinforce the weak points and
improvement areas.

3. 3
Preliminary design calculation – Light Distribution Measurements
 Main constrains:
 Limiting factor during light distribution modeling, was inability to model the
actual light distribution matrix into DIALux.

4. 4
Preliminary design calculation – Gloss Measurements and Materials
 Critical Parameters:
 Gloss was measured in % of light reflected from a surface at 3 different
angles (20Deg, 60Deg, and 85Deg).
 85 Degree angle measurements were used as more appropriate, as the
majority of surfaces were medium to low reflectance.
 Main constrains:
 Limiting factor during material simulation was the lack of information of the
original manufacturers, and accurate CAD data of the furniture and
objects.

5. 5
Preliminary design drawings – 2D layout of the room
TOP VIEW
TOP VIEW

6. 6
Preliminary design drawings – 3D layout of the room

7. 7
Preliminary design drawings – Illumination Simulation of the room

8. 8
Issues Encountered
Some Issues were encountered during design:
It was hard to get accurate 3D models of the furniture, as not all manufacturers
provide those online.
Some of the room materials had to be estimated and guessed, as their origin
was unknown.
Gloss values measured were difficult to factor in into the design suite, as
design suit definition of the reflectance factor, did not actually correlate with the
reflectance factor of the gloss meter manufacturer. A workaround was adopted
by applying a “reflective” coating to the surface of the materials, that provided
the gloss factor, meanwhile the “reflectance factor” of the material was a mere
color property.
DIALux design suite has difficulty rendering detailed 3D objects, unlike
SolidWorks (for example). As a result – every simulation took 1 hour (on
average to complete). Therefore another limitation during design was an
insufficient number of accurate simulations with different luminaires.

9. 9
Final design – 2D layout
TOP VIEW
SIDE VIEW

10. 10
Final design – 3D layout of the room

11. 11
Final design – Illumination Simulation of the room

12. 12
Final design – Light Fixtures
AFTERBEFORE

13. 13
Final design – Light Distribution
AFTERBEFORE

14. 14
Final design – Cost Savings

15. 15
Final design – Conclusion
Final solution to the design included the following:
140W Fluorescent STIFF 88637W90 Light fixtures with T8 light bulbs were
replaced by LED LVO04-4x36-011 PRS alternatives.
LED LVO04-4x36-011 PRS Light fixtures provided an overall increase in
average brightness by 34%
Light distribution in the room became more even (seen on graphs)
Yearly cost saving were calculated to be $608.02 with initial one-time
investment calculated to be $438.00 (Parts + Labor).
AFTERBEFORE