Inputs
Results
Light output ratio
--
%
Difference from lamp lumens
--
lm
Luminaire efficacy
--
lm/W
Data quality
--
Test condition
--
Calculation details
- Light output ratio
- -- %
- Difference from lamp lumens
- -- lm
- Luminaire efficacy
- -- lm/W
- Data quality
- --
- Test condition
- --
Important notes
- Use luminaire lumens, not bare lamp lumens, for fixture count and maintained illuminance estimates when available.
- This comparison is not product certification or compliance advice.
Formulas
- \(\displaystyle LOR = \Phi_{\mathrm{luminaire}} / \Phi_{\mathrm{lamp}}\)
- \(\displaystyle \eta = \Phi_{\mathrm{luminaire}} / P\)
Compare bare lamp lumens against luminaire lumens and estimate light output ratio and system efficacy.
Lamp vs Luminaire Output Comparison 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.