CandlePower The unit for measuring the quantity or intensity of light energy emitted by a directional lamp (i.e., narrow spot, spot, flood, wide flood, etc.).

CandlePower is expressed in Candelas. Confusion is caused for some when one manufacturer lists a lamps CandlePower as "Center-Beam CandlePower" while another notes it as "Mean CandlePower" while still another uses "Candela" as the heading for the same information in their Lamp Data Chart. Any of these listings refer to the lamp CandlePower and are considered to be the same.

CandlePower is used in the Inverse Square Law calculation.

Some texts indicate that 1 candela = 12.57 lumens; do not try to convert lumens to candelas using this formula. Results will be inaccurate.