Inputs
Results
Target maintained illuminance
--
lux
Average measured illuminance
--
lux
Measured gap
--
lux
Variance from target
--
%
Status
--
Measurement plane
--
Next action
--
Calculation details
- Target maintained illuminance
- -- lux
- Average measured illuminance
- -- lux
- Measured gap
- -- lux
- Variance from target
- -- %
- Reading count
- --
- Status
- --
- Measurement plane
- --
- Next action
- --
Important notes
- Average measured illuminance is evidence for the recorded readings only; retain plane, grid, instrument, date, and conditions.
- A gap result does not establish compliance or diagnose the cause of a lighting shortfall.
Formulas
- \(\displaystyle \Delta E = E_{\mathrm{avg,measured}} - E_{\mathrm{target,maintained}}\)
- \(\displaystyle \%\Delta E = \frac{\Delta E}{E_{\mathrm{target,maintained}}} \times 100\)
Compare measured average illuminance with a maintained target and record the direction and size of the gap.
Maintained Illuminance Gap 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.