How to Reduce Street Lighting Costs with Monitoring: Strategies and Savings

Street lighting electricity costs are a significant recurring expense for many local governments and property management operators. One of the first questions that arises when considering a smart street lighting project is: How much can we actually save?

The answer depends on the existing lighting infrastructure, but there is a clear framework for calculating potential savings.

Where Do the Savings Come From?

The following five factors contribute to reducing public street lighting (PJU) operating costs.

It is important to distinguish between savings achieved by replacing conventional lighting with energy-efficient LEDs and additional savings generated through monitoring and control systems.

Both approaches complement each other, but their individual contributions should be calculated separately to ensure an accurate and transparent project evaluation.

Important Note: Lower Energy Consumption Does Not Automatically Reduce Electricity Bills

Many public street lighting installations in Indonesia operate under a non-metered billing system, where electricity charges are calculated based on estimated installed capacity and operating hours rather than actual energy consumption.

Under this arrangement, reducing electricity consumption through dimming does not necessarily result in lower electricity bills because charges are not based on actual usage.

Several studies and local government initiatives have therefore explored electricity metering to better align billing with actual consumption.

To maximize potential savings, street lighting projects should follow three key steps:

1. Conduct a lighting inventory: Identify all street lighting points, installed power ratings, and existing metering arrangements.
2. Implement metering or billing verification: Coordinate with the electricity provider to verify consumption and billing in accordance with applicable procedures.
3. Deploy monitoring and control systems: Implement scheduled dimming and collect actual kWh data to demonstrate energy savings.

Beyond Energy Savings: Additional Operational Benefits

In addition to reducing electricity consumption, a smart street lighting monitoring system can help lower several other operating costs:

• Reduced nighttime inspections: Automatic fault detection minimizes the need for routine patrols to identify malfunctioning streetlights.
• More efficient maintenance visits: Technicians can respond to specific faults, reducing unnecessary travel, transportation expenses, and maintenance time.
• Potentially longer equipment lifespan: Optimized lighting operation may extend the service life of LED fixtures and drivers under suitable operating conditions, reducing replacement frequency.
• Improved asset security: Monitoring systems can help identify unusual operating conditions and support the detection of equipment theft or asset loss.

How to Verify Actual Energy Savings

To ensure that reported savings are accurate and measurable, project operators should establish a structured monitoring and evaluation process.

1. Record baseline electricity consumption and billing information before implementing the project.
2. Use pilot areas and comparable control areas to evaluate performance improvements.
3. Measure actual kWh consumption using controllers or electricity meters rather than relying solely on estimates.
4. Document all changes to operating schedules and dimming profiles.
5. Prepare periodic performance reports for management teams and relevant decision-makers.

This approach provides measurable evidence of energy efficiency improvements and supports more informed investment decisions.

How to Calculate Street Lighting Savings Using Your Own Data

The following framework can be applied to estimate monthly electricity consumption and potential cost savings.

1. Calculate monthly electricity consumption:

   Number of lighting points × Power per lighting point (kW) × Operating hours per day × 30 days = Monthly energy consumption (kWh).

2. Calculate monthly energy costs:

   Multiply total monthly consumption (kWh) by the applicable electricity tariff per kWh.

3. Compare different lighting scenarios:

   Repeat the calculation for conventional lighting, LED replacement, and LED lighting with scheduled dimming.

4. Estimate maintenance savings:

   Include potential reductions in inspection costs, technician visits, and equipment replacement expenses.

5. Account for additional operating costs:

   Deduct expenses associated with monitoring platforms, connectivity services, and operational personnel to determine estimated net savings.

For the most reliable results, use actual consumption data collected from pilot lighting controllers rather than relying exclusively on manufacturer specifications.

This ensures that project evaluations are supported by measurable evidence and can withstand review by management teams, auditors, and other stakeholders.

Conclusion

Reducing public street lighting electricity costs requires a combination of energy-efficient LED technology, scheduled dimming, optimized operating hours, responsive maintenance, and accurate electricity billing verification.

However, achieving measurable financial benefits requires more than simply reducing electricity consumption.

Ensuring that electricity billing reflects actual usage, supported by reliable monitoring data, is essential for translating energy efficiency improvements into real operational cost savings.

With the right monitoring and control strategy, local governments and property operators can improve street lighting efficiency, reduce operational expenses, and make more informed infrastructure management decisions.

Ready to Make Your Street Lighting Smarter?

The IoT Kreasi Indonesia team is ready to support your smart street lighting journey, from initial lighting assessments and pilot projects to full-scale implementation across cities and commercial or industrial areas.

Discuss your project requirements with our team at weiots.io.