To calculate lumens from candlepower:
\[ L = \text{CP} \times 12.57 \]
Where:
Candlepower is a unit of luminous intensity, representing the amount of light emitted by a source. It is also known as luminous intensity and is derived from the brightness of a standard candle. In modern usage, it is often referred to in terms of candelas (cd), with one candlepower roughly equal to 0.981 candelas.
Assume a light source has a candlepower of 100:
Using the formula:
\[ L = 100 \times 12.57 = 1257 \text{ lumens} \]
So, a candlepower of 100 corresponds to 1257 lumens.