Inputs
Results
Lumens at low UF
--
lm
Lumens at high UF
--
lm
Lumens difference
--
lm
Sensitivity
--
%
Planning status
--
Calculation details
- Lumens at low UF
- -- lm
- Lumens at high UF
- -- lm
- Lumens difference
- -- lm
- Sensitivity
- -- %
- Planning status
- --
Important notes
- Utilisation factor depends on photometry, room geometry, reflectance, and maintenance assumptions.
- Use this as sensitivity planning support only; it is not a compliance declaration.
Formulas
- \(\displaystyle \Phi = \frac{E \times A}{UF \times MF}\)
- The calculator compares two explicit UF assumptions and does not select a project UF.
Show how a low and high utilisation factor assumption changes required initial lumens.
Utilisation Factor Impact 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.