Inputs

Bay length m Enter a numeric project value in m at or above 0.1. Bay width m Enter a numeric project value in m at or above 0.1. Mounting height m Enter a numeric project value in m between 0.1 and 30. Beam angle degrees Enter a numeric project value in degrees between 1 and 179. Maintained illuminance target lux Enter a numeric project value in lux at or above 0.01. Luminaire lumens lm Enter a numeric project value in lm at or above 0.01. Utilisation factor Enter a numeric project value between 0.01 and 1. Maintenance factor Enter a numeric project value between 0.01 and 1.

Bay area -- m2

Beam diameter at floor plane -- m

Beam footprint area -- m2

Fixture count --

Review note --

Calculation details

Bay area: -- m2
Beam diameter at floor plane: -- m
Beam footprint area: -- m2
Fixture count: --
Estimated maintained illuminance: -- lux
Photometric handoff required: --
Review note: --

Important notes

Do not claim uniformity, glare control, or vertical task performance without suitable photometric calculation.
This high-bay estimate is planning support only and does not establish NCC or workplace compliance.

Formulas

\(\displaystyle D = 2H \tan(\theta/2)\)
\(\displaystyle N = \left\lceil \frac{E \times A}{\Phi \times UF \times MF} \right\rceil\)

Estimate high-bay quantity and beam footprint while flagging photometric handoff conditions.

High-bay Lighting Planner 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.

Inputs

Results

Formulas

Related calculators