Why a light switch delay and why are the same color temperatures different?

Light sources can be divided into type 2:

·        Non-dimmable

·        Dimmable

When the non-dimmable driver turns on the light, before starting to charge the capacitor, when the capacitor voltage exceeds the start-up voltage of the power chip, the power chip will start to work;

When the Dimmable driver has turned on the light, this power supply will generally use the MCU to perform attenuation control, to ensure reliability, it will add a bit of delay and stability to the power supply and therefore control the output, to avoid flickering and flickering; (Or due to an incompatible dimmer.)

Thus, LEDs have a specific delay when they are turned on. When the driver has the power, the lights have a delay, this is normal.

When we talk about color temperature, we usually talk about correlated color temperature (CCT). There is a difference between these two.

Color temperature (CT)

The color temperature (CT) defines the exact point of the light source on the line of the Planckian locus. This line is depicted in the image below as the black line in the middle. So, if there are two light sources, which have a color temperature of 4000K, they both look the same as they are both in the same spot.

Related color temperature (CCT)

The related color temperature is used when the light source is turned off by the Planckian locus. If CT defines the exact point on the site, CCT defines the perpendicular line that flows directly through that exact point. So if a light source is off from the place, then CCT is the closest CT point to the locust. For example, if a light source has a CCT of 4000K, it means that it can be on any point on the line that crosses the 4000K point on the locus. You can see these lines on the image. Generally, a color temperature of the light sources is announced as CCT. So, if we say that two light sources have a CCT of 4000K, this means that they are on the same line that crosses the 4000K spot, but they could, in fact, appear completely different.

Chromatic coordinates

Usually, the chromaticity of the light source is defined in the diagram as chromatic coordinates. In this diagram, it is not possible to determine that CCT is the shortest distance from the place. You can see the chromaticity diagram in the image below.

So when you have three devices that have the same 4000K CCT, you can have three totally different colored lights.

If the light has a greenish white light, this means that the color coordinate is located above the Planckian locus.

If the light has a purple tone, the chromatic coordinates are below the place.

If the light is normal white light, the chromatic coordinates are on the site or at least very close to it.

So please remember that setting the CCT does not always tell you everything. If you use two different light sources with the same CCT, you should always check the coordinates and see if these two are actually the same color.

Also, read about Led track light for the barber shop.