Retrofit projects should not be framed as a simple lamp swap. Electricity, maintenance, downtime and control savings all belong in the payback calculation.
Project copy can use phrases such as factory lighting retrofit, warehouse lighting payback and industrial LED retrofit when they are tied to calculation assumptions and site conditions.
Build the baseline
Record quantities, operating hours, measured power, failures and current illuminance.
- Separate measured and nameplate data
- Track by zone
- Keep before photos
Compare the whole solution
LED replacement, optics, circuit changes and smart controls should be evaluated together.
- Do not compare unit price only
- Include maintenance cost
- Include downtime
Use conservative payback inputs
Tariffs, hours, depreciation and maintenance should all carry some margin.
- Avoid over-optimism
- State assumptions
- Keep a pilot zone
How to explain payback
Keep retrofit scope, energy calculation, maintenance cost, control strategy and acceptance records in one review method.
- State the scene
- State assumptions
- State acceptance data
