Replacement of Street Lighting Systems
Lighting
Measure Goal
The goal is to standardize the calculation of electricity savings triggered by the replacement of street lighting systems, taking into account all consumption-relevant parameters such as luminaire type, mounting height, street width and lighting class.
Symbols, Terms and Units
| Symbol | Description | Unit |
|---|---|---|
E | annual electricity consumption | kWh/a |
ΔEeco | cumulative electricity savings | kWh |
PL | luminaire power | W |
n | number of light points | - |
hJahr | annual operating hours | h/a |
Ns | standard effective duration | a |
Calculation Formulas
Annual Electricity Consumption Street Lighting
The annual electricity consumption results from the number of light points multiplied by the power per luminaire and the annual operating hours.
Number of Light Points
The number of light points results from the street length divided by the light point spacing.
Annual Electricity Savings
The annual electricity savings result from the difference between electricity consumption before and after the measure.
Cumulative Electricity Savings
The cumulative electricity savings result from the annual savings multiplied by the standard effective duration and the correction factor.
Examples and Scenarios
Replacement of lighting on through roads and residential streets
Inputs
450m M2 (10m wide) + 270m P3 (7m wide)
Downloads
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