Convert Nanocandelas to Hefnerkerzen
Convert Nanocandelas (ncd) to Hefnerkerzen (HK) instantly and accurately.
Conversion Formula
HK = ncd × 1.086956522e-9
About Nanocandelas
The nanocandela (ncd) equals 10⁻⁹ cd. The scale of extremely faint bioluminescence: a single luciferin-luciferase reaction emits around 1-10 ncd; dark-adapted firefly flashes peak at a few hundred ncd. Also the range for cooled avalanche-photodiode sensitivity characterisation. 1 ncd = 10⁻⁹ cd.
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.
Quick Reference Table
| Nanocandelas (ncd) | Hefnerkerzen (HK) |
|---|---|
| 1 ncd | 1.087 × 10-9 HK |
| 2 ncd | 2.174 × 10-9 HK |
| 5 ncd | 5.435 × 10-9 HK |
| 10 ncd | 1.087 × 10-8 HK |
| 25 ncd | 2.717 × 10-8 HK |
| 50 ncd | 5.435 × 10-8 HK |
| 100 ncd | 1.087 × 10-7 HK |