In the device international or candle (symbol cd) light intensity. The order of the intensity of light, the human feeling of the brightness of light shined from the a wellspring of light in the direction specified is by the function of brightness (a model standard of the sensitivity of the human eye to different wavelengths, with which the name of the function, the effect of light also known) weight is given. An ordinary candle together with the approximation of not-so-good a light intensity. If you sent in some direction by a barrier, dull, be blocked, etc. sent out in the direction that are not blocked continue to have almost 1 will be.

the word in the Latin language and the many languages of new to meaning of the candle.