TRILUX Luminaires - Proljus AB

Energy efficiency
Decision-makers for planning, construction
and operation of outdoor lighting are caught
in the area of conflict between the requirements
of
• Lighting quality
• Design and
• Cost effectiveness.
The term cost-effectiveness can be reduced
in most cases to the cost analysis and in
turn to the current energy and maintenance
costs.
Costs of outdoor lighting
Generally, the annual recurring overall costs
of an outdoor lighting system may be divided
into three main areas and diverse sub-areas
(fig. 2.1):
• Energy costs
• Maintenance costs
• Investment costs
In this case, the energy costs account for
approx two thirds. Maintenance and investments
make up the remainder with almost
the same percentages (fig. 2.2). Then there
are also the costs for administration and
operation management on top of that. Costs
for new building, reconstruction and system
upgrades are taken into account separately,
since these cannot be assigned to the overall
annual costs for the operation of lighting
systems.
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Energy costs
Inspection
Costs for
maintenance
Overall
annual costs
Inspection Maintenance Repair
Cleaning Remedying damages
Corrosion protection Correcting problems
Relamping
Investment costs
Renewal
2.1 Breakdown of the overall annual costs of an outdoor lighting system.
Replacement
Replacement