Candle to Berlin Candle Conversion

Comparison Chart of Candle to Berlin Candle units to understand their conversion accurately.


Please enter the value below for converison from Candle to Berlin Candle units or vice versa.

Candle (International Standard Candle)

Introduction : The international candle was a photometric unit of luminous intensity used before the candela. It represented the light emitted by a standard type of flame under specific conditions, typically a pure spermaceti candle burning at a fixed rate.

History & Origin : Established in the 19th century and internationally recognized in the early 20th century, the international candle served as a practical lighting reference. It was later replaced by the candela due to the need for a more precise and reproducible standard.

Current Use : Today, the international candle is primarily of historical interest. It once formed the foundation for calibrating photometric instruments and measuring lamp brightness, especially in early electric and flame-based lighting systems.

Berlin Candle (Prussian Photometric Standard)

Introduction : The Berlin candle was a Prussian-era luminous intensity standard with an output close to 1.11 candela. It offered a more stable photometric reference compared to traditional candles, based on more precise flame control.

History & Origin : Developed in 19th-century Berlin for use in state laboratories and engineering standards, it was a regional solution before national and later international unification of light units like the Hefner and candela.

Current Use : Used primarily in official calibration settings and state-operated photometric labs. It became obsolete with the emergence of more reproducible flame-based units and ultimately the metric-based candela standard.

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References

• NIST (US Government)
• Encyclopaedia Britannica