Hefner Candle to Candle (International) Conversion

Convert between Hefner Candle and Candle (International) quickly and accurately.

From Hefner Candle

hefner candle

To Candle (International)

How to Convert Hefner Candle to Candle (International)

Conversion Formula

1 hefner candle = 0.9 c

1 c = 1.111 hefner candle

Example

Convert 15 hefner candle to c:

15 hefner candle = 15 × 0.9 c = 13.5 c

Unit Information

Learn about the luminous intensity units you're converting between

Hefner Candle

hefner candle

Definition

The Hefner Candle is a unit of luminous intensity based on the light output of a Hefner lamp burning amyl acetate. It was developed as a standardized reference for luminous intensity measurements and was widely used in German-speaking countries before the adoption of international standards.

History/Origin

Named after Friedrich von Hefner-Alteneck, who developed this standard in 1884. It was based on the light output of a specific lamp burning amyl acetate and provided a reproducible standard for photometric measurements in Germany and other German-speaking regions.

Current Use

Primarily of historical interest, though may still be referenced in older German technical specifications or photometric literature. It has been largely replaced by the international candle standard for modern applications and scientific measurements.

Multiplier

0.9

Offset

Candle (International)

Definition

The Candle (International) is the SI base unit of luminous intensity, defined as the luminous intensity in a given direction of a source that emits monochromatic radiation of frequency 540×10¹² hertz and has a radiant intensity in that direction of 1/683 watt per steradian.

History/Origin

The international candle was established in 1948 as part of the International System of Units (SI). It replaced earlier candle standards and provides a precise, reproducible definition based on fundamental physical constants, ensuring consistency in light measurement worldwide.

Current Use

Widely used as the standard unit for measuring luminous intensity in scientific research, lighting design, and photometric applications. It is essential for calibrating light sources, designing lighting systems, and ensuring accurate light measurements in various industries.

Multiplier

Offset