Inputs
Results
Maintained illuminance
--
lux
Initial illuminance
--
lux
Illuminance gap
--
lux
Reduction
--
%
Comparison note
--
Calculation details
- Maintained illuminance
- -- lux
- Initial illuminance
- -- lux
- Illuminance gap
- -- lux
- Reduction
- -- %
- Comparison note
- --
Important notes
- Use maintained illuminance language for workplace planning and retain the maintenance assumptions with the result.
- Australian standards and project targets require current, task-specific review; this calculator does not declare compliance.
Formulas
- \(\displaystyle E_{\mathrm{maintained}} = E_{\mathrm{initial}} \times MF\)
- \(\displaystyle E_{\mathrm{initial}} = \frac{E_{\mathrm{maintained}}}{MF}\)
Compare initial and maintained illuminance using a supplied maintenance factor.
Maintained vs Initial Lux Calculator is a planning aid. Keep the target source, product data, measurement method, and project assumptions with the result. Confirm compliance, installation, certification, and safety decisions with the responsible professional.
FAQs
Why can initial lux be higher than maintained lux?
The maintenance factor represents the assumed retained performance after depreciation and maintenance effects.