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Learn these knowledge of lamps and lanterns

Update:05 Jul 2019
Summary:

Have you ever traveled all over the city in building ma […]

Have you ever traveled all over the city in building materials and furniture markets without finding a suitable lamp?
A good lamp undertakes the important task of adjusting the atmosphere of the house. The scattering of light and the cooling and warming of color temperature will create different light.
Shadow effect can bring people different visual experience, but also convex
It shows the function of different rooms.
Here is a systematic introduction to the selection of lamps and lanterns.
Light parameters
In order to have better lighting effect or light atmosphere, we need to know more about lighting.
It is believed that many people still know about the parameters of lamps and lanterns on the wattage. In fact, the three parameters are the main factors that really affect the brightness, cooling and heating effect and lighting effect of lamps and lanterns.

Light intensity, color temperature and color rendering index. (Key points!)
Illumination intensity refers to the flux of visible light received per unit area in Lux, which is used to describe the brightness of light. Specific values can be measured by an illuminometer.
The relationship between illumination and lumen is Lux = luminous flux/illuminated area.
For example, light flux is equivalent to water flow, which is how much water is flowing out, through or into in one second, and light flux (lumen) is how much light is flowing out, through or into in one second. The illumination corresponds to the amount of lucid light flowing into an area of one square metre.
The illumination is the owner's most concerned about "my house lights are not bright enough", which shows that we often say, "Wow, this lamp is too bright, it's blinding!"

But please note that the power of the lamp is not necessarily related to the intensity of the light. Because the luminous efficiency of different types of lamps is very different, for example, about 8W LED lamp and 40W incandescent lamp actually have the same brightness.
Color temperature refers to the color of light. You can understand the visual temperature that light brings to you, that is, warm light, cold light, etc. in Kelvin (K).
The light with low color temperature and more red radiation become what we often call warm light, while the light with high color temperature and blue radiation increase into what we call cold light.
Usually in quiet atmosphere suitable for the use of low-color temperature light, high-color light when working. The upper limit of color temperature is 6500K.

Color rendering index refers to the degree to which light restores the color of an object. The higher the color rendering index is, the more realistic the performance of light on the real color of an object is.
The higher the color rendering index, the stronger the degree of reduction, and the lower the color rendering index, the worse the visual fatigue. The color rendering index of sunlight is 100. Generally, outdoor lighting needs more than 65 color rendering index and indoor lighting needs more than 80 color rendering index.

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