The instrument facilitates the conversion between candlepower, an older unit of luminous depth, and lumens, the usual unit of luminous flux. For instance, a light-weight supply measured at a particular candlepower can have its whole mild output quantified in lumens utilizing this conversion device. This permits for direct comparisons between mild sources specified utilizing completely different metrics.
The importance of such a conversion device lies in bridging historic lighting measurements with fashionable requirements. Previous to standardized items like lumens, candlepower was generally used to explain the brightness of sunshine sources. Using this conversion allows a extra goal evaluation of older lighting applied sciences relative to up to date ones, simplifying the method of understanding historic lighting knowledge and evaluating it to present specs.