1. What is Illumination Intensity?

Illumination intensity refers to the level or strength of light in a given area. It quantifies the amount of light reaching a surface and is typically measured in units such as lux or foot-candles.

2. How Does the Calculator Work?

The calculator uses the illumination formula:

Where:

• \( E_v \) — Illumination Intensity (Lux)
• \( F \) — Luminous Flux (Lumen)
• \( A \) — Area of Illumination (m²)

Explanation: The formula calculates the illumination intensity by dividing the total luminous flux by the area over which the light is distributed.

3. Importance of Illumination Calculation

Details: Accurate illumination calculation is crucial for lighting design, ensuring adequate lighting levels for various activities, energy efficiency, and creating comfortable visual environments.

4. Using the Calculator

Tips: Enter luminous flux in lumens and area in square meters. All values must be valid (flux > 0, area > 0).

5. Frequently Asked Questions (FAQ)

Q1: What is the difference between luminous flux and illumination intensity?
A: Luminous flux measures the total light output from a source, while illumination intensity measures the amount of light falling on a surface per unit area.

Q2: What are typical illumination levels for different environments?
A: Office spaces typically require 300-500 lux, while detailed tasks may need 750-1000 lux. Residential areas usually range from 100-300 lux.

Q3: How does distance affect illumination intensity?
A: Illumination intensity decreases with the square of the distance from the light source (inverse square law).

Q4: Can this calculator be used for outdoor lighting?
A: Yes, the same formula applies to both indoor and outdoor lighting calculations.

Q5: What factors can affect illumination measurements?
A: Surface reflectivity, light source characteristics, measurement angle, and environmental conditions can all affect illumination measurements.