Maintained lux is the target after expected depreciation, while initial lux is the estimated starting point before maintenance effects are applied.
What to record
- The target plane and room or task area used in the calculation.
- The maintenance factor and whether the target is maintained or initial.
- The utilisation or spacing assumptions behind the estimate.
Calculator output is an estimating aid. Confirm project-specific requirements, products, electrical work, and compliance decisions with the responsible professional.