Violle to Bougie Decimale Conversion

Comparison Chart of Violle to Bougie Decimale units to understand their conversion accurately.


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Violle (Platinum Standard Unit)

Introduction : The Violle unit was a high-intensity luminous standard based on a platinum source. Emitting about 20.17 candela, it aimed to offer a more stable and reproducible light reference before the candela was defined.

History & Origin : Proposed in 1884 by French physicist Jules Violle, the unit was based on the luminous intensity from a square centimeter of platinum at its melting point. Though precise, it was difficult to reproduce, limiting its adoption.

Current Use : Mainly used in academic settings and early photometric labs, the Violle unit represented the pursuit of precision in light measurement. It has since been entirely replaced by modern SI-based methods.

Bougie Décimale (French Decimal Candle)

Introduction : The bougie décimale was a French unit of luminous intensity approximating one candela. It aimed to offer a metric-aligned alternative to traditional candles for use in scientific and industrial measurements.

History & Origin : Introduced during France's push toward metrication, the bougie décimale simplified the candlepower unit into a decimal-based form. It was roughly equal to the candela and served as a bridge during the transition to SI photometric units.

Current Use : While rarely referenced today, it played a role in early 20th-century photometry, particularly in countries transitioning to SI standards. It was used in lamp ratings, lighting research, and optical engineering.

Conversion of Violle to all other Units

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References

• NIST (US Government)
• Encyclopaedia Britannica