Candela Lumens Calculator

How Candela Lumens works

The arithmetic follows candela = lumens ÷ steradians. Candela Lumens uses Lumens in beam, Beam solid angle to report Luminous intensity.

With the loaded values, luminous intensity evaluates to 833.33 cd. A second case makes the effect of one changed measurement visible.

Inputs for Candela Lumens

Lumens in beam and Beam solid angle belong to Candela Lumens. Keep source units with lumens in beam.

No recommendation is implied by the loaded example. Use measurements from the intended scenario.

Lumens in beam

Example entry: 1000 lm.

Beam solid angle

Example entry: 1.2 sr.

Reading the Candela Lumens result

This output represents Candela Lumens.

The worksheet isolates arithmetic; final ratings need a broader equipment check.

Measurement and units

Photometric results depend on fixture distribution, reflectance, mounting, maintenance, and the measured task plane. Check prefixes on lumens in beam.

Preserve the measurement basis when testing alternatives. Continue to Lighting Wall-Plug Efficiency Calculator for wall-plug efficiency.

Limits of this calculation

Real beams are not perfectly uniform. Use Light Beam Diameter Calculator.

Treat the formula as one part of the overall electrical analysis. Unentered effects remain outside Candela Lumens. Use LED Strip Voltage Loss Calculator to a separate voltage loss calculation.

A useful Candela Lumens comparison

Record luminous intensity before testing a different lumens in beam value.

Document the alternate lumens in beam source.

Candela Lumens record notes

Record source and operating details for lumens in beam.

Retain raw luminous intensity beside its selected rating.

Questions about Candela Lumens