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Light Spread Formula:
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The Beam Angle To Light Spread calculation determines how wide a light beam will be at a specific distance from the source. This is essential for lighting design, photography, and any application where precise light coverage is important.
The calculator uses the light spread formula:
Where:
Explanation: The formula calculates the width of the light beam based on trigonometric principles, where the tangent of half the beam angle determines the spread ratio.
Details: Accurate light spread calculation is crucial for proper lighting design, ensuring adequate illumination coverage, avoiding dark spots, and achieving the desired lighting effect in various applications.
Tips: Enter the distance from the light source in feet and the beam angle in degrees. Both values must be positive numbers for accurate calculation.
Q1: What is beam angle in lighting?
A: Beam angle is the angle between the two directions where the light intensity is 50% of the maximum intensity at the center of the beam.
Q2: How does distance affect light spread?
A: The light spread increases proportionally with distance - the farther from the light source, the wider the beam spread.
Q3: Can I use this calculator for different units?
A: This calculator uses feet for distance, but you can convert other units to feet before calculation (1 meter = 3.28084 feet).
Q4: Does this calculation work for all light types?
A: Yes, the formula works for any directional light source where the beam angle is known, including LEDs, spotlights, and flashlights.
Q5: How accurate is this calculation?
A: The calculation provides a theoretical spread based on perfect geometric principles. Actual light spread may vary slightly due to optical design and light source characteristics.