Question 1

What’s beam angle and field angle?

Accepted Answer

In symmetrical lighting, the angle between the two directions for which the intensity is 50 per cent of the maximum intensity as measured in a plane is called beam angle. For asymmetrical lighting, the beam angle is generally given for two planes 90 degrees apart. The angle between the two directions for which the intensity is ten per cent of the maximum intensity as measured in a plane is called field angle.

Question 2

What’s the standard regarding glare assessment？

Accepted Answer

Determining the glare effect of a light source or a group of light sources is complex, as the size, brightness, and position of the light source all influence the perceived level of glare. Although glare is a subjective experience, it can be evaluated during the lighting design phase according to the CIE 112-1994 standard. The effectiveness of this system is limited to viewing directions below eye level and is calculated for the positions of the calculation grid points. At each calculation point, an evaluation is performed every 15°, starting from 0° or 180°, for a total of 360°, resulting in 24 calculations. The observation position should be 1.75 meters above the playing field. For each observer's position, the maximum glare rating and its corresponding direction should be recorded.

Question 3

What’s the required CCT for sports lighting?

Accepted Answer

According to standards set by football associations such as FIFA, UEFA, and AFC, the correlated color temperature of sports lighting is typically determined by the specific lighting class required. These mainstream standards generally recommend a correlated color temperature (CCT) range of 4200K to 6200K for stadium lighting. Correlated Color temperature refers to the visual appearance of light, whether it is warm (red/yellow tones) or cool (blue/white tones), and is measured in Kelvin (K). Warm light is similar to the sun in the early morning or evening during winter, with a yellowish hue, generally below 4000K; cool light is similar to daylight in summer or midday in winter, appearing whiter (cooler), generally at 5000K or higher. Sports lighting typically uses the latter, higher color temperature, and even environmentally conscious associations like Darksky recommend higher color temperatures. Furthermore, higher color temperatures can help athletes concentrate, while warmer color temperatures have the opposite effect and reduce visibility.

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LED Street Light

Solar Street Light

Led Flood Light

Solar Flood Light

LED High Bay Light

High Mast Light

LED Traffic Light

LED Tunnel Light

LED Garden Light

LED Canopy Light

Led Bollard Light

Lighting Accessories

Smart Systems

Simulation Design

Smart Financing