Luminous Intensity Converter - Convert Candela, Lumen/sr, Hefnerkerze & More Units
Result:
1 cd = 1 lm/sr
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How Luminous Intensity Conversion Works
Our luminous intensity converter helps you change light measurements from one unit to another. Luminous intensity shows how bright a light source appears in a specific direction. The candela is the main unit for measuring luminous intensity.
When you convert candela to lumen per steradian, you get the same number because they measure the same thing. The hefnerkerze is an older unit that was used before candela became standard. Candle power and international candle are also older units still used in some places.
Input Value
Enter your luminous intensity number
Select Units
Pick from candela, hefnerkerze, or other units
Get Result
See your converted luminous intensity
Easy Luminous Intensity Conversion Formulas
These simple formulas help you convert between different luminous intensity units. Our light intensity tool uses these exact calculations to give you accurate results every time.
Candela to Hefnerkerze:
HK = cd Ć 1.107
Example: 10 candela = 10 Ć 1.107 = 11.07 hefnerkerze
Hefnerkerze to Candela:
cd = HK Ć 0.903
Example: 5 hefnerkerze = 5 Ć 0.903 = 4.515 candela
Candela to Candle Power:
cp = cd Ć· 1.019
Example: 8 candela = 8 Ć· 1.019 = 7.851 candle power
Candela to Lumen per Steradian:
lm/sr = cd Ć 1
Example: 15 candela = 15 Ć 1 = 15 lumen per steradian
Luminous Intensity Conversion Table
| Candela (cd) | Lumen/sr | Hefnerkerze | Int. Candle | Candle Power |
|---|---|---|---|---|
| 0.1 | 0.100 | 0.111 | 0.098 | 0.098 |
| 0.5 | 0.500 | 0.553 | 0.491 | 0.491 |
| 1 | 1.000 | 1.107 | 0.981 | 0.981 |
| 2 | 2.000 | 2.214 | 1.963 | 1.963 |
| 5 | 5.000 | 5.535 | 4.907 | 4.907 |
| 10 | 10.000 | 11.070 | 9.814 | 9.814 |
| 20 | 20.000 | 22.140 | 19.627 | 19.627 |
| 50 | 50.000 | 55.350 | 49.068 | 49.068 |
| 100 | 100.000 | 110.700 | 98.135 | 98.135 |
| 200 | 200.000 | 221.400 | 196.271 | 196.271 |
| 500 | 500.000 | 553.500 | 490.677 | 490.677 |
| 1000 | 1000.000 | 1107.000 | 981.354 | 981.354 |
| 2000 | 2000.000 | 2214.000 | 1962.709 | 1962.709 |
| 5000 | 5000.000 | 5535.000 | 4906.771 | 4906.771 |
| 10000 | 10000.000 | 11070.000 | 9813.543 | 9813.543 |
Luminous Intensity Units Progression Chart
0.1 cd
1 cd
5 cd
10 cd
50 cd
100 cd
Frequently Asked Questions
What is the difference between candela and lumen per steradian?
Candela and lumen per steradian are the same thing. Both measure luminous intensity in the same way. Our luminous intensity calculator treats them as equal units.
How do I convert hefnerkerze to candela?
To convert hefnerkerze to candela, multiply the hefnerkerze value by 0.903. For example, 10 hefnerkerze equals 9.03 candela. Use our hefnerkerze calculator for quick results.
Why do I need candle power conversion?
Candle power is an older unit still used in some lighting specifications. Converting candle power to candela helps you understand modern light measurements and compare different products.
Is this photometry unit converter accurate?
Yes, our light intensity tool uses standard conversion factors approved by international lighting organizations. All calculations follow official photometry standards.
Practice Problems with Solutions
Try these examples to learn how luminous intensity conversion works. Each problem shows you step-by-step how to change from one unit to another.
Problem 1:
A flashlight has 25 candela. How many hefnerkerze is this?
Solution: 25 Ć 1.107 = 27.675 hefnerkerze
Problem 2:
An old lamp shows 15 hefnerkerze. What is this in candela?
Solution: 15 Ć 0.903 = 13.545 candela
Problem 3:
Convert 8 candela to candle power for an old specification.
Solution: 8 Ć· 1.019 = 7.851 candle power
Problem 4:
A vintage bulb shows 12 international candle. Find the candela.
Solution: 12 Ć· 1.019 = 11.772 candela
What is Luminous Intensity?
Luminous intensity measures how bright a light source looks in a certain direction. Think of it like the strength of a flashlight beam. The candela (cd) is the main unit we use to measure luminous intensity.
A lumen per steradian (lm/sr) is the same as a candela. This unit tells us how much light comes from a source in a specific angle. The hefnerkerze calculator helps convert old German light measurements to modern units.
Candle power conversion is useful when working with older lighting systems. International candle and decimal candle are historical units that some industries still use today.
Common Examples of Luminous Intensity
Everyday Light Sources
- ā¢ Candle flame: 1 candela
- ā¢ LED bulb (60W): 100-200 candela
- ā¢ Car headlight: 15,000-30,000 candela
- ā¢ Flashlight: 1,000-10,000 candela
- ā¢ Lighthouse beam: 2,000,000 candela
Professional Applications
- ā¢ Stage spotlights: 50,000+ candela
- ā¢ Camera flash: 10,000-50,000 candela
- ā¢ Emergency lights: 500-2,000 candela
- ā¢ Aircraft landing lights: 100,000+ candela
- ā¢ Search lights: 500,000+ candela
Why Use a Luminous Intensity Converter?
A photometry unit converter helps you work with different light measurement systems. Engineers, lighting designers, and photographers need to convert between candela, hefnerkerze, and candle power for their projects.
LED bulb shopping becomes easier when you understand candela ratings
Car headlight upgrades require knowing luminous intensity limits
Flashlight comparisons use candela to show beam brightness
Stage lighting design needs precise luminous intensity control
Photography flash units show power in candela measurements
Safety regulations often specify minimum luminous intensity values