How to Test the Color Temperature of LED Wall Washers?

I believe many are somewhat familiar with the term "color temperature." Color temperature actually refers to the point at which a black body is heated to emit light of a certain color, which is comparable to the color of the light emitted by a light source. Similarly, the heating temperature of the black body is referred to as the color temperature, commonly known as the color temperature.

When our lighting mainly consisted of incandescent lamps, if the color temperature difference between light sources was 150K, we could use our eyes to discern the difference between them. However, the color temperature difference in the LED era, especially with architectural LED wall washers greatly differs from that of the incandescent lamp era.

Obviously, this involves colors that can be distinguished by the naked eye. How different are the data values, and not by much? This leads to the concept of "relative color temperature."

The data obtained from testing should be related to color temperature, but what if it’s not directly on point? The answer is, indeed, it can be. Color temperature refers to the color of light emitted by a light source at a certain temperature, which matches the color of a black body, and this temperature is referred to as the color temperature of the light source. In other words, it can only be considered color temperature if it falls directly on the black body radiation line.

Moreover, the light emitted by linear LED wall washers is not from thermal radiation, so its light color might not fall directly on the black body radiation line, leading us to find a nearby point, or "related color temperature."

In fact, some lights slightly differ from the light emitted by a 3000K black body, but along this line, can only be described as 3000K.

One color might be green, another red. Although they appear quite different to us, they are both referred to as 3000K.

Many might find it puzzling that color temperature can shift towards green or red, so how can this issue be addressed? Enter our protagonist today: color tolerance, making its formal debut. It denotes the difference between the x and y values, calculated by the photometric colorimetry system software and standard light sources. The smaller the value, the higher the precision, and the purer the color of the light.

Architectural LED wall washers are mainly high-powered products, while linear LED wall washers focus on low-powered products. Because the suitability of LED wall washers depends on the height of illumination, high-powered LED wall washers are more capable at a certain distance. Linear LED wall washers can be low-power molded. In the construction of architectural LED wall washer projects, LED wall washers face challenges in heat dissipation and waterproofing. To design for drainage and convection, during the production process of LED wall washers, it is first necessary to process the LED wall washers with a dispensing machine, and then cover them with silicone sealant over the glass cover to achieve structural waterproof bonding.