1. What is a Lux to Candela Calculator?

Definition: This calculator converts illuminance in lux to luminous intensity in candela at a specified distance.

Purpose: It helps lighting professionals, engineers, and designers understand the relationship between illuminance and luminous intensity.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( cd \) — Luminous intensity (candela)
• \( lx \) — Illuminance (lux)
• \( d \) — Distance from light source (meters)

Explanation: The lux value is multiplied by the square of the distance to determine the light source's intensity in candela.

3. Importance of Lux to Candela Conversion

Details: This conversion is essential for lighting design, ensuring proper illumination levels and comparing light source performance.

4. Using the Calculator

Tips: Enter the illuminance in lux and the distance in meters. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between lux and candela?
A: Lux measures illuminance (light falling on a surface), while candela measures luminous intensity (light emitted by a source).

Q2: Does distance affect the conversion?
A: Yes, the relationship is quadratic - doubling the distance requires 4x the candela to maintain the same lux level.

Q3: When would I need this conversion?
A: When specifying light sources based on required illumination levels at certain distances.

Q4: What's a typical lux level for offices?
A: Office spaces typically require 300-500 lux, while detailed work areas may need 750-1000 lux.

Q5: How accurate is this calculation?
A: It assumes a point light source in ideal conditions. Real-world factors like reflectors or diffusers may affect results.