Published by Neo Han Shern · 11 August 2026
Streetlight calculation in Malaysia: road width, pole spacing and the right optic
A DIALux guide to streetlight layouts for residential areas, industrial roads and access roads in Malaysia.
The road profile sets the calculation
Streetlight design begins with the real road: carriageway width, lanes, kerbs, footpaths, medians and planned pole positions. These inputs decide how the luminaire optic and spacing should be tested.
A DIALux road calculation uses defined evaluation areas so the layout can be assessed for the surfaces people actually use.
Pole spacing is a design decision
Wider spacing may reduce pole count, but it can also reduce consistency between luminaires. Closer spacing with an unsuitable optic may still cause unwanted glare or light outside the intended road area.
Testing the chosen streetlight photometry with practical mounting heights and boom positions makes the trade-offs visible before construction.
Include the surrounding environment
For residential or mixed-use locations, consider footpaths, junctions, driveways and nearby properties. The aim is purposeful road illumination with controlled spill, rather than simply maximum output.
Frequently asked questions
What is needed for a streetlight DIALux calculation?
Provide a road plan or cross-section, dimensions, lanes, footpaths, pole locations, mounting heights, selected streetlight data and the required lighting class or target.
Can streetlight calculations cover residential roads?
Yes. Residential roads can be modelled using their actual geometry, pole arrangement and the relevant evaluation areas.