Inputs
Results
Throw distance
--
m
Beam diameter
--
m
Footprint area
--
m2
Average beam lux
--
lux
Calculation details
- Throw distance
- -- m
- Beam diameter
- -- m
- Footprint area
- -- m2
- Average beam lux
- -- lux
Important notes
- This uses a simple circular footprint and average lumens; real beams are not uniform.
- Use product photometry for design decisions; this estimate does not declare compliance.
Formulas
- \(\displaystyle D = 2H\tan(\theta/2)\)
- \(\displaystyle E_{\mathrm{avg}} = \Phi / A\)
Estimate geometric beam footprint area and average beam lux from lumens, beam angle, and target-plane height.
Beam Footprint Lumen Estimate 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.