PowerEngineerLab · TOOL-014
Lighting Energy Savings Calculator
Compare existing and replacement lighting assumptions across transparent energy and payback metrics.
02 / Result
Lighting energy savings
Enter the existing and replacement lighting assumptions.
Method and boundaries
Annual energy = power × quantity × hours per day × days ÷ 1000. Savings compare the existing and replacement assumptions.
This estimate does not compare illuminance, lumen output, lifetime, color rendering, maintenance or code compliance. The two systems are not assumed to be functionally equivalent.
Method and boundaries
Annual energy = power × quantity × hours per day × days ÷ 1000. Annual savings compare existing and replacement assumptions; simple payback = upgrade cost ÷ annual cost savings when savings are positive.
This estimate does not compare illuminance, lumen output, lifetime, color rendering, maintenance or code compliance. SRC-010 · model 1.0.0 · user-input-v1.