Convert Hefnerkerze to Watt at 555nm
Convert hefnerkerzen to watts at 555nm by entering a value below.
How to Convert Hefnerkerzen to Watts at 555nm
The hefnerkerze and watt at 555nm are both units of luminous flux. 1 watt at 555nm equals 63.416898793 hefnerkerzen. This means to convert hefnerkerzen to watts at 555nm, you divide by 63.416898793.
Formula
Step-by-Step Example
Convert 5 HK to watts at 555nm:
We need to convert hefnerkerzen to watts at 555nm
Since 1 W@555nm = 63.416898793 HK, divide by 63.416898793
5 ÷ 63.416898793 = 0.0788433382
5 HK = 0.0788433382 W@555nm
Hefnerkerze to Watt at 555nm Conversion Table
Quick reference table for common hefnerkerze to watt at 555nm conversions. Click any value for detailed calculation.
| Hefnerkerzen (HK) | Watts at 555nm (W@555nm) |
|---|---|
| 1 HK | 0.0157686676 W@555nm |
| 2 HK | 0.0315373353 W@555nm |
| 5 HK | 0.0788433382 W@555nm |
| 10 HK | 0.1576866764 W@555nm |
| 15 HK | 0.2365300146 W@555nm |
| 20 HK | 0.3153733529 W@555nm |
| 25 HK | 0.3942166911 W@555nm |
| 50 HK | 0.7884333821 W@555nm |
| 100 HK | 1.5768667643 W@555nm |
About These Units
Hefnerkerze (HK)
The Hefnerkerze (HK) is a historical German unit based on the Hefner lamp flame (amyl acetate). One Hefnerkerze ≈ 0.903 international candelas. Mean Spherical HK × 4π ≈ lumens. Used in Germany until mid-20th century; now obsolete.
Watt at 555nm (W@555nm)
Watts at 555nm represents the peak luminous efficacy of radiation: exactly 683 lumens per watt at 555nm wavelength (green-yellow light where human eye is most sensitive). This fundamental constant links radiometric (watts) to photometric (lumens) measurements.
Frequently Asked Questions
How do I convert hefnerkerzen to watts at 555nm?
To convert hefnerkerzen to watts at 555nm, divide the value by 63.416898793. For example, 10 HK = 0.1576866764 W@555nm.
How many watts at 555nm are in 1 hefnerkerze?
1 hefnerkerze equals 0.0157686676 watts at 555nm.
What is the formula for hefnerkerzen to watts at 555nm?
The formula is: W@555nm = HK ÷ 63.416898793.