Hefner Candle to Lumen per Steradian Conversion

Convert between Hefner Candle and Lumen per Steradian quickly and accurately.

From Hefner Candle

hefner candle

To Lumen per Steradian

lm/sr

How to Convert Hefner Candle to Lumen per Steradian

Conversion Formula

1 hefner candle = 0.9 lm/sr

1 lm/sr = 1.111 hefner candle

Example

Convert 15 hefner candle to lm/sr:

15 hefner candle = 15 × 0.9 lm/sr = 13.5 lm/sr

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

Lumen per Steradian

lm/sr

Definition

The Lumen per Steradian is a unit of luminous intensity that is dimensionally equivalent to the candela. It represents the luminous flux emitted in a given direction per unit solid angle, providing an alternative way to express luminous intensity in terms of luminous flux.

History/Origin

Derived from the fundamental definition of the candela, which is one lumen per steradian. It provides an alternative perspective on luminous intensity by emphasizing the relationship between luminous flux and solid angle in photometric measurements.

Current Use

Widely used in theoretical photometry and in calculations where the luminous flux aspect of light is emphasized. It provides a direct link to the fundamental definitions of light measurement and is interchangeable with the candela in most practical applications.

Multiplier

Offset