Candela = --
A Lumens to Candela Calculator is a useful tool for converting the total light output (lumens) of a source to its intensity in a particular direction (candela). This is particularly important when working with focused light sources, like spotlights and LEDs, where light is directed toward a specific point or area.
What Are Lumens and Candela?
- Lumens (lm) measure the total light emitted by a source in all directions.
- Candela (cd) measures the intensity of light emitted in a specific direction, or how concentrated the light is.
While lumens measure the overall light output, candela focuses on the light intensity in a particular direction. The relationship between these two depends on the beam angle of the light source.
The Conversion Formula
To convert from lumens to candela, you need to know the beam angle of the light source. The formula is:
Candela = (Lumens × 1000) ÷ (Beam Angle Factor)
The Beam Angle Factor is calculated based on the beam angle of the light, which tells you how concentrated the light is. For a narrow beam, the light is more intense, whereas for a wide beam, the light is less intense but covers a larger area.
Example Calculation
Suppose an LED light emits 1,000 lumens and has a beam angle of 30°. You can use the following steps:
- Calculate the Beam Angle Factor for a 30° beam angle:
Beam Angle Factor ≈ 0.079 (for 30°). - Convert lumens to candela:
Candela = (1,000 × 1000) ÷ 0.079 ≈ 12,658 cd
This means the light has an intensity of approximately 12,658 candela.
Why Use a Lumens to Candela Calculator?
- Accuracy: The calculator simplifies the conversion process and ensures precise results.
- Focused Lighting: It helps in designing lighting systems where directional intensity is essential, such as spotlights, flashlights, and automotive lights.
- Efficiency: By automating the calculations, it saves time and effort in complex lighting designs.
Applications of Lumens to Candela Conversion
- Spotlight Design: Useful for determining the intensity of directional lighting.
- Lighting for Displays: Helps ensure proper light intensity in focused areas, like display cabinets or stage setups.
- Architectural Lighting: Ensures light intensity is focused where needed, such as in outdoor fixtures or architectural features.
Conclusion
A Lumens to Candela Calculator is a powerful tool for anyone working with focused lighting. By understanding how to convert between total light output and directional intensity, you can optimize your lighting designs for any application, ensuring both efficiency and performance.
