Distribution of luminous intensity

The distribution of luminous intensity means how the luminaire produces and illuminates its surroundings. The luminous intensity distributions are presented either on luminaire or LED module levels. The measurements have been conducted in the lighting laboratory of Aalto University, the VTT Technical Research Centre of Finland and at commercial enterprises. All tests have been conducted at room temperature.  
The figures and images of the distribution presented here are of one LED module, if not stated otherwise. When a luminaire has multiple LED modules and it is far away from the object to be lighted (the relative distance between the luminaire and the object is more than ten), the data of one module provides sufficient information on the distribution of luminous intensity. The amount of light should be adjusted to correspond to the number of the LED modules. The light distribution files (LDT-files) are used in lighting design software such as DIALux.

Since LED components are now becoming more and more powerful, Valopaa LED luminaires use LEDs of various power classes. Updates to the newest LED techniques and units are done whenever possible. Therefore, the optics presented here might contain data for different power classes; depending on the LEDs used, the amount of light with one LED module can be either 800 lm or 900lm. If the luminaire uses 700mA of power, the amount of lumen is 1.7 times bigger than the measured amount.

When assembling a LED luminaire, it is possible to choose LED modules with different light distributions, please download the light distribution files. Lighting designers now have the freedom to create very different lighting implementations. We are continuously developing new optical solutions based on customer feedback.

Optics for street lighting

Lens V14. Developed especially for normal street lighting. The asymmetrical distribution of luminous intensity produces symmetrical light onto the street by having the luminaire tilted by five degrees.

Lens V11. A lens suitable for lighting narrow streets. Best applicable for pedestrian streets and roads at residential areas, where light pollution is to be avoided.

Lens V12. For lighting wider streets than V11. Asymmetric light distribution produces an even light onto the street.

Optics for general lighting

Rotationally symmetrical luminous intensity distributions, or optics with a round light beam, are suitable for spotlighting and general lighting, depending on the light fixture and lighting location.

Lens V8. Developed for general lighting. Light beam 90°,  600 cd/module.  Suitable to lighting of e.g. industrial halls, parking areas and underpasses.

Lens V9. 200 cd/module, lambertial distribution of luminous intensity. The adjacent image displays a distribution of luminous intensity for general lighting.

Lens V9B. Suited for general lighting, e.g. for ceilings in underpasses and petrol station meters, as well as indoors. Wide light beams, but the lens has been designed to minimise glare when installed to low ceilings.

Lens V9C. This light distribution has been designed especially for general lighting, and suits garden and park lighting. It is also a good choice for retrofit installations. The lens generates a very wide and round light beam.

Optics for spotlighting

Lens V7. A spotlighting lens with a 5000cd/module and a 20° light beam for spotlighting and accent lighting.

Lens V10. 2000 cd/module, light beam 35°. Developed especially for spotlighting and accent lighting. 

Specialty optics

Lens V13. Designed particularly for lighting signposts and commercial signs.