Eurolight
The widespread application of LED street lights has provided a more reliable and efficient solution for urban road lighting. However, choosing the color temperature (CCT) of LED streetlights to achieve optimal visual comfort has always been a controversial and concerning topic. This article introduces common color temperatures for LED street lighting, their impacts on visual comfort and light pollution, and how to choose a suitable color temperature.
Color temperatures of LED streetlights
The color temperatures （CCT） for LED streetlights typically include 2700K, 3000K, 4000K, 5000K, and 6000K-6500K. 3000K LED bulbs emit a softer yellow light, creating a warm and comfortable atmosphere, while 6000K LED bulbs emit very bright white light, which may be too glaring. As the color temperature increases, the color of the light emitted by the LED bulb gradually changes from yellow to bluish-white, indicating that the intensity of bluish-white light waves is increasing.
Factors for selecting the CCT of street lights
First, the usage scenario is a key factor in determining color temperature. In areas where a warm and comfortable atmosphere is needed, such as residential areas, parks, or pedestrian streets, a lower color temperature (2700K-3500K) is more suitable, as this warm-toned light can bring a relaxing and pleasant feeling. Conversely, in places requiring high brightness and clear visual effects, such as commercial streets, highways, or industrial areas, a higher color temperature (4000K-6500K) is more appropriate. It provides lighting closer to natural light, making the colors of objects more realistic, helping pedestrians and vehicles clearly identify their surroundings, and reducing the risk of accidents.
Secondly, climate conditions are also an important factor influencing the choice of color temperature. In cold regions, lower color temperature lights can bring a sense of warmth, helping to alleviate the cold atmosphere of winter. In hot regions, higher color temperature lights may make people feel more refreshed and reduce discomfort caused by high temperatures.
To be a summary as follows:
3000K is preferred in residential areas: soft and non-glaring, avoiding sleep disturbances, suitable for slow-paced living areas.
4000K is recommended for main roads: high visibility ensures driving safety, and shop signs are displayed more accurately.
Flexible combinations in transitional areas: 3500K can be used on park trails, balancing comfort and visibility.
Attention
Besides the color temperature, these factors are also worth noting:
- Weather effects: 4000K offers better penetration in foggy areas.
- Light fixture height: Using 4000K for high-mast lights reduces the difference in light and shadow on the ground.
- Plant illumination: 3000K causes less interference with plant growth at night.
- Light pollution control: Warmer color temperatures have a lower impact on stargazing.