Prismalence AB in association with Nordic Light AB and Vattenfall (a large utility in Scandinavia), have developed a road lighting fixture which creates a lighting system with a low total cost for its lifespan.

The lighting fixture is manufactured in pure aluminum with a hardened optical glass lens. Lens and reflector are optimized to each other to ensure as little loss of light as possible. The light source consists of a ceramic metal halogen lamp and there are 35, 70 and 150 watt varieties. The lamp provides a very white light with an RA index over 90. The lamp is powered by an electronic device that not only prolongs the lifespan of the lamp but also experiences less energy loss than "ordinary" power devices. The lamp effect can be dimmed, for example at times of low traffic. The optic system can be selected with different spreading angles up to 162 degrees.

This facilitates an optimum lighting area when replacing existing lighting fixtures with small post distances and for new lighting systems the distance can be increased to >80 metres. Another possibility is to remove every other light point in an existing system in order to reduce maintenance costs, etc.

Road lighting savings using CDM & our patented optics

Vattenfall have replaced a number of road lighting fixtures in the borough of Vännäs, with a new fixture using 35W CDM light sources and Prismalence optics with a light spread of 140°.

The new fixtures, called Cobra, have replaced road lights equipped with 125W mercury light sources. The Cobra now gives higher lux- and candela-levels and a more even light spread than before, using only 35W. Measurements that have been done show values comparable to a 70W HPS, but with the added advantage of a full colour light.

 The Cobra, using Prismalence optics and 35W CDM light sources, can replace 70W HPS or 125W Hg in street and road lighting applications without loss in visibility or lux/candela values. Prismalence optics gives, in addition a more even light spread, less light pollution and the possibility (using the Prismalence 162° super-wide angle) of placing light poles as far as 60 metres apart and still have overlapping light patterns.

The above statements are verified by Vattenfall Service Nord, which have done the Vännäs installation.