Huge saving potentials utilizing new technology. Outdated installations increase energy costs and new technology represents a large cost cutting potential in the rehabilitation of outdoor lighting installations. With new installations there is great saving potential when employing new enriching adaptive lighting techniques which are possible with today’s high technology.
Old installations inflict unnecessary yearly costs. By correct investments and utilizing today’s technology it is possible to reduce today’s energy consumption for street and road lighting by as much as pproximately 60 %. For Europe as a whole, this stands for about 36 TWh a year. In addition, you also achieve a significant saving on maintenance costs.
Recently there has been a tendency towards a shift in the responsibility for costs related to installation and operation of street lighting installations. In Norway this came as a law reform in 1991, the law stated that it is no longer allowed to make cross subsidies of street lighting within the electricity companies. This means that the road keeper have to cover all the costs related to installation and operation of the street light.
There are several factors that emphasize the importance of a holistic focus when considering investments in these kinds of installations.
Normally public authorities have two different budgets for running and maintaining the installations as well as investing and construction. This does not make it easy for overall consideration of the installations total economical aspects. This is also applicable to adaptive lighting where re-investments, in some cases, can have a “payback time” as short as 5 years or less.
When sending out a tender, there is today a public demand that all purchasing and contracts should be in accordance to existing laws of public purchase. It is also important that the tender gives a thorough description of what functional demands should be addressed in a lighting installation, so that afterwards you can choose the best total solution in terms of both investment costs, running costs and maintenance costs (ref. LCC).
As much as 50-70 % of the original energy consumption can be saved by reinvesting in new technologies where old in-efficient luminaires have been replaced, changed lighting arrangements and the introduction of stepless dimming in relation to adaptive lighting and as much as 70 % in energy reduction has been achieved. By replacing the luminaires only, between 40-50 % energy reductions is achieved.
In addition, by implementing two way communication (luminaires with built-in intelligence), you achieve an accurate feedback on the lamps condition and thereby reduce the need for manual control, and may plan maintenance in a cost effective way. To keep a better track of your installation and secondarily to optimize the priorities for the maintenance of the road, the road keeper should have an electronic record of his installations, based on a digitalized mapping system where each component is registered as individual traceable objects with a geographical reference.