Lumen per Steradian to Hefner Candle Conversion
Convert between Lumen per Steradian and Hefner Candle quickly and accurately.
How to Convert Lumen per Steradian to Hefner Candle
Conversion Formula
Example
Convert 15 lm/sr to hefner candle:
Unit Information
Learn about the luminous intensity units you're converting between
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
1
Offset
0
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
0
Lumen per Steradian to Hefner Candle Conversion Table
| Lumen per Steradian [lm/sr] | Hefner Candle [hefner candle] |
|---|---|
| 1 lm/sr | 1.111111 hefner candle |
| 10 lm/sr | 11.111111 hefner candle |
| 25 lm/sr | 27.777778 hefner candle |
| 50 lm/sr | 55.555556 hefner candle |
| 100 lm/sr | 111.111111 hefner candle |
| 0 lm/sr | 0E+0 hefner candle |
| -10 lm/sr | -11.111111 hefner candle |
| -40 lm/sr | -44.444444 hefner candle |
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