Photometric Testing
Performance checked and guaranteed
With energy costs rising, it is vital to ensure you choose the right combination of lamp position and reflector type to give you the best photometric distribution possible. With so many choices available, it’s often hard to know which one will be the best for your project. But we have a number of methods that will ensure you get the most from your product.
At Urbis we test all the equipment in our standard product ranges, as every luminaire has a specific photometric distribution depending on the reflector used and the lamp position. Our experienced engineers can also use our facilities to customise our luminaires to ensure you get the optimal performance.
Urbis uses the following state-of-the-art equipment to ensure you get the best photometric performance possible from your product:
- The mobile gonio-reflectometer, better known as the ‘Memphis’:
The benefit: As it’s mobile, it removes the cost of taking samples and conducting laboratory tests. It also gives the street lighting designer an accurate knowledge of the ‘real’ reflective characteristics of the road surface.
The Memphis is able to quickly evaluate road reflectance properties accurately on site. To complete a measurement only takes four to five minutes on-site by an experienced engineer, and the entire process is controlled by dedicated software installed on a laptop. Armed with this data, our designers are able to ensure that the scheme will not be under-lit, or over-lit, whatever the road surface is made of. - The goniophotometer:
The benefit: The laboratory goniophotometer uses its revolving mirror and measurement distances of 10 and 30 metres to indicate the spatial distribution of the luminous intensity of any type of reflector. This allows us to optimise the efficiency of the lamp and reflector set up in each luminaire. - Quadrangular surface reflectometer.
The benefit: The quadrangular surface reflectometer measures the photometric characteristics of road surfaces in the laboratory. This allows our engineers to ensure the optimal lighting levels will be achieved. - Dark Room:
The benefit: Our state-of-the-art dark room means that luminaires can be tested under 'in situ' conditions. It is possible for us to simulate the lighting distribution levels for both a road or tunnel section using the dark room.
