BS EN 13201-4:2015

What is BS EN 13201-4-Measuring lighting performance in road lightings about? 

BS EN 13201-4 is a European standard that covers methods for measuring lighting performance in road lighting, ensuring efficiency, visibility and performance in road lighting maintenance and development applications. 

BS EN 13201-4 specifies measurement conditions and procedures for measuring the photometric quality parameters of road lighting installations, i.e., the quantities that quantify their performances in accordance with EN 13201-2 lighting classes. BS EN 13201-4 includes a methodology to evaluate the road lighting performances considering tolerances in the design parameters is described in the informative Annex A. 

Note: BS EN 13201-4 does not cover parameters used for quantifying the energy performance of road lighting installations. 

Who is BS EN 13201-4-Measuring lighting performance in road lightings for? 

BS EN 13201-4 on measuring lighting performance in road lightings applies to: 

• Manufacturers and suppliers of road lightings 
• Dealers and importers of road lightings 
• Contractors and infrastructure developers 
• Construction, civil and design engineers 
• Road maintenance authorities 
• Inspection and quality assurance services 

Why should you use BS EN 13201-4-Measuring lighting performance in road lightings? 

By allowing pedestrians and automobiles to see each other, road lighting promotes safety. A lighting class is defined by a set of photometric requirements aiming at the visual needs of certain road users in certain types of road areas and environments. Assessment of performance ensures safety and visibility in road applications. BS EN 13201-4 establishes conventions and procedures for the characterization based on measurements of road lighting installations considering the photometric quality parameters, i.e. the set of quantities that characterize a lighting class. 

BS EN 13201-4 provides users guidance on preliminary information of road lighting system measurement, measurement conditions, photometric measurements, measurement of non-photometric parameters, tolerance analysis and test report, enabling users to accurately measure lighting performance. BS EN 13201-4 gives users advice on the use and selection of luminance meters and illuminance meters for applications, ensuring the classification, usability and applicability in road lighting. 

With obedience and compliance of BS EN 13201-4, users can accurately measure the performance metrics, enabling users to design road lightings to ensure stable operability and prevention of accidents in different seasons and environments. 

What’s changed since the last update? 

BS EN 13201-4:2015 supersedes BS EN 13201-4:2003, which is now withdrawn. Changes in BS EN 13201-4:2015 include  

• The definition of different aims of measurement with peculiar requirements in order to optimize the instrument characteristics, measurement cost and time 
• A deeper comparison between static and dynamic measurement requirements 
• Addition of specific requirements for ILMD (Image Luminance Measuring Device) when used as a luminance meter 
• Evaluation of measurement uncertainty 
• Comparison with requirements or design expectation carried out considering the expanded measurement uncertainty of the measure