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How to Convert from Lumen/steradian [lm/sr] to Decimal candle?
Learn the method to convert luminous intensity units from lumen per steradian to decimal candle, understanding their definitions, uses, and historical context.
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Lumen/steradian [lm/sr] to Decimal candle Conversion Table
| Lumen/steradian [lm/sr] | Decimal candle |
|---|
Custom Unit Conversion Table Generator – Instant Printable Conversion Tables
Enter the starting number (positive decimal or integer ≥ 0). Example: 0.1, 1, 5.
Enter the ending number (positive decimal or integer > Start Value). Example: 10, 50, 100.
Enter the step size (positive decimal > 0 and < End Value – Start Value). Example: 1.0, 2.5.
| Lumen/steradian [lm/sr] | Decimal candle |
|---|
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What Is This Tool?
This converter allows you to change values from lumen per steradian, a modern luminous intensity unit, to the decimal candle, a historic measure of light intensity used before the candela became standard.
How to Use This Tool?
- Input the luminous intensity value in lumen per steradian (lm/sr).
- Select the target unit as decimal candle for conversion.
- View the converted value, which corresponds directly due to the one-to-one equivalence.
Key Features
- Converts luminous intensity values between lumen/steradian and decimal candle.
- Displays equivalent values for precise comparison of lighting intensities.
- Supports contextual understanding of historical and modern luminous intensity units.
Examples
- Convert 5 lm/sr to decimal candles to get 5 decimal candles.
- Convert 0.1 lm/sr to decimal candles resulting in 0.1 decimal candles.
Common Use Cases
- Specifying luminous intensity ratings of LEDs and flashlights in directional visibility terms.
- Comparing beam intensities of vehicle headlights and stage lighting in photometric tests.
- Relating modern lighting measurements to historical lighting standards.
- Calibrating and understanding early photometric instruments and data.
Tips & Best Practices
- Use the tool to translate modern luminous intensity figures into historical contexts clearly.
- Apply conversion when working with restoration or research involving vintage lighting instruments.
- Remember that the decimal candle is obsolete and calibrations may vary due to candle quality.
Limitations
- The decimal candle is outdated and may not provide precise calibration like modern SI units.
- Environmental factors and candle quality impact the accuracy of historical measurements.
- Conversions assume equivalence but practical conditions can produce variations.
Frequently Asked Questions
- What does lumen per steradian measure?
- Lumen per steradian quantifies luminous intensity as luminous flux emitted per unit solid angle, equivalent numerically to the candela.
- Why convert from lumen/steradian to decimal candle?
- Users convert to relate modern light intensity measures to historical units, useful in research and legacy data calibration.
- Is the decimal candle still used today?
- No, the decimal candle is a historical unit replaced by the candela but relevant for studying past lighting standards.
Key Terminology
- Lumen per steradian [lm/sr]
- A unit measuring luminous intensity, equal to the amount of luminous flux per unit solid angle, equivalent to the candela.
- Decimal candle
- A historical luminous intensity unit defining light from a standard candle used in 19th-century photometry, now replaced by the candela.
- Luminous intensity
- The measure of visible light emitted in a particular direction per unit solid angle.