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Floodlight Coverage Area

Calculate Floodlight Coverage Area instantly with the exact formula and a worked example.

Floodlight Coverage Area

Illuminance (lux)
Height, m
Floodlight P, W
Φ, lm
Radius
5.6419m
r ≈ √(Φ/(π·E))Calculate Floodlight Coverage Area instantly with the exact formula and a worked example.
r
5,64 m

More about: Floodlight Coverage Area

What it calculates

The “Floodlight Coverage Area” calculator computes Radius in m from 4 parameters: illuminance (lux), height, m, floodlight p, w, φ, lm.

A standard physics formula used in educational and engineering tasks.

Example calculation

With parameters Illuminance (lux) = 100, Height, m = 6, Floodlight P, W = 100, Φ, lm = 10,000 the result is 5.64 m (r ≈ √(Φ/(π·E))).

How to use

  1. Enter illuminance (lux), height, m, floodlight p, w and φ, lm — each field above is adjustable with a slider.
  2. Radius (m) is calculated automatically as you type.
  3. Check the worked example below to see the formula applied to real numbers.
  4. Copy the result or bookmark this calculator.

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FAQ

How is Floodlight Coverage Area calculated?
The Floodlight Coverage Area calculator computes Radius (in m) from illuminance (lux), height, m, floodlight p, w, φ, lm. Enter your values above and the exact formula is applied instantly; a worked example with real numbers is shown below.
Is the Floodlight Coverage Area calculator free?
Yes. It is completely free, needs no signup, runs entirely in your browser, and sends no data to any server.

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