Question 1

Dialux use point-by-point method or lumen calculation method？

Accepted Answer

Dialux uses the point-by-point method and ray tracing method instead of the lumen calculation method. Interestingly, some other mainstream lighting simulation software also use these two calculation methods. In addition, Relux and AGI32 also use the radiosity method.

Question 2

What's Ray Tracing Method?

Accepted Answer

Ray tracing method is a computer graphics technology used to simulate light propagation and interaction, which is widely used in lighting design, rendering and optical analysis. It simulates the lighting effects in the real world by tracing the path of light from the light source, through reflection, refraction and absorption, and finally reaching the observer or sensor.

Question 3

What are the lighting requirements for a workshop?

Accepted Answer

For example, in metal working and processing factory, the EN12464 standard recommends that the lighting intensity for welding should be at least 200 lux, and the lighting intensity for precision machining (grinding) should be at least 300 lux. But for inspection, it requires at least 750 lux. For assembly areas, its requirements vary depending on the level of detail of the work. It requires a minimum of 200 lux for rough assembly, 300 lux for medium assembly, 500 lux for fine assembly, and 750 lux for precision assembly.

Question 4

What is the main difference between the lumen calculation method and the point-by-point method?

Accepted Answer

The lumen calculation method estimates the average illuminance ($E$) over an entire indoor space based on total luminous flux, room geometry, utilization factor (UF), and maintenance factor (MF). In contrast, the point-by-point method calculates direct illuminance at a specific target point using the inverse square law and cosine law, making it ideal for non-uniform lighting or complex 3D ray-tracing software like DIALux.

Question 5

Why is the lumen calculation method not suitable for outdoor lighting projects?

Accepted Answer

The lumen calculation method relies heavily on interior reflective surfaces (ceilings and walls) to determine the Utilization Factor (UF). Since outdoor environments lack ceilings and walls, light cannot be reflected back to the working plane. For outdoor applications like sports stadiums, roadways, and parking lots, using 3D simulation software based on point-by-point calculation is strongly recommended.

Question 6

How do I get an exact DIALux 3D lighting simulation for my factory or warehouse project?

Accepted Answer

While the lumen method gives a quick manual estimate, a DIALux simulation provides precise false-color lux renderings, 3D fixture positioning, and uniformity ratios. You can contact our engineering team with your room dimensions (Length × Width × Height) and target Lux requirements to receive a free customized 3D lighting report within 24 hours.

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LED Street Light

High Mast Light

Led Flood Light

Solar Flood Light

LED High Bay Light

LED Tunnel Light

LED Garden Light

Led Bollard Light

Solar Street Light

LED Traffic Light

LED Canopy Light

Lighting Accessories

Smart Systems

Simulation Design

Smart Financing