Full name: petacandela
Plural form: petacandelas
Category type: luminous intensity
Scale factor: 1.0E+15
The SI base unit for luminous intensity is the candela.
1 candela is equal to 1.0E-15 petacandela.
Valid units must be of the luminous intensity type.
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The SI prefix "peta" represents a factor of 1015, or in exponential notation, 1E15.
So 1 petacandela = 1015 candelas.
The definition of a candela is as follows:
The candela (symbol: cd) is the SI base unit of luminous intensity. It is the power emitted by a light source in a particular direction, weighted by the luminosity function. A common candle emits light with a luminous intensity of roughly one candela. The candela is officially defined as the luminous intensity of a source that emits monochromatic radiation of frequency 540×1012 hertz and that has a radiant intensity of 1/683 watt per steradian.