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

\[ lm = cd \times (2 \pi (1 - \cos(\theta / 2))) \]

Where:

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