Violle to Decimal Candle Conversion

Comparison Chart of Violle to Decimal Candle 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.

Decimal Candle (Metric Approximation)

Introduction : The decimal candle was an early metric adaptation of the traditional candle unit. Designed for consistency in metric systems, it approximated the international candle at exactly one candela for simplification.

History & Origin : This unit was introduced as countries began transitioning to the metric system. The decimal candle approximated traditional light units using the metric structure, acting as a bridge between historical and SI units.

Current Use : Though rarely used today, the decimal candle provided a practical way to express candlepower using metric conventions, especially during the early phases of SI integration in scientific and engineering contexts.

Conversion of Violle to all other Units

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References

• NIST (US Government)
• Encyclopaedia Britannica