Inputs
Results
Maintained lumen requirement
--
lm
Initial lumen requirement
--
lm
Maintenance reserve
--
lm
Maintenance reserve
--
%
Calculation details
- Maintained lumen requirement
- -- lm
- Initial lumen requirement
- -- lm
- Maintenance reserve
- -- lm
- Maintenance reserve
- -- %
Important notes
- Do not reduce a project-specific maintained illuminance requirement to a universal room table.
- Australian standards and project targets require current, task-specific review; this calculator does not declare compliance.
Formulas
- \(\displaystyle \Phi_{\mathrm{maintained}} = \frac{E_{\mathrm{maintained}} \times A}{UF}\)
- \(\displaystyle \Phi_{\mathrm{initial}} = \frac{\Phi_{\mathrm{maintained}}}{MF}\)
Convert a maintained illuminance target into maintained and initial lumen requirements.
Maintained Lumen Requirement 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
What is the maintenance reserve?
It is the additional initial lumen allowance implied by the supplied maintenance factor compared with the maintained lumen requirement.