Convert Hefnerkerzen to Candelas
Convert Hefnerkerzen (HK) to Candelas (cd) instantly and accurately.
Conversion Formula
cd = HK × 0.92
About Hefnerkerzen
The Hefnerkerze (HK) equals 0.920 cd (DIN 5031 conventional value). The German photometric standard unit from 1884 to 1942, defined by the luminous intensity of a Hefner lamp burning amyl acetate. Used as the official German standard before the adoption of the international candela. 1 HK = 0.920 cd.
About Candelas
The candela (cd) is the SI base unit of luminous intensity. A standard wax candle emits ~1 cd; a 60 W incandescent bulb ~60 cd (assuming Lambertian emission); a 1 W white power LED ~100 cd peak in a 5° beam. Defined since 2019 by fixing K_cd = 683 lm/W at 540 THz. 1 cd = 1 lm/sr.
Quick Reference Table
| Hefnerkerzen (HK) | Candelas (cd) |
|---|---|
| 1 HK | 0.92 cd |
| 2 HK | 1.84 cd |
| 5 HK | 4.6 cd |
| 10 HK | 9.2 cd |
| 25 HK | 23 cd |
| 50 HK | 46 cd |
| 100 HK | 92 cd |