## Lumen to Candela Calculator

### Calculation Formula

The formula to calculate Candela (\(cd\)) from Lumens (\(lm\)) is:

\[ cd = \frac{lm}{2 \pi (1 - \cos(\theta / 2))} \]

Where:

- \(cd\) is the luminous intensity in candela.
- \(lm\) is the luminous flux in lumens.
- \(\theta\) is the apex angle in degrees.

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