I believe that everyone will not deny that lighting plays an irreplaceable role in the stage, shops, and homes. However, with the development of technology, there are so many kinds of lamps and lanterns brands on the market , which makes people dazzled not to know how to choose.

　　Today, the editor will come to talk with you about the experience of buying lamps and lanterns in home decoration, hoping to help friends who have this need.

　　1. Summary of lighting knowledge

　　Color temperature

　　Color temperature is a unit of measurement that expresses the color components contained in light. In fact, the warm white light, warm yellow light, cold white light, etc. indicated on the light source are all qualitative expressions of color temperature.

　　The measurement unit of color temperature is " K " (Kelvin), and the corresponding colors from low color temperature to high color temperature are orange-red, white, and blue. The light with high color temperature is bluish and has a refreshing feeling. The color temperature of the deep blue sky can reach 20000k . The light with low color temperature tends to be reddish, and the color temperature at dusk is generally below 3000k .

　　Lights of different color temperatures will be used in the lighting to give people different feelings.

　　brightness

　　The brightness here is a general qualitative concept, that is, whether the light is on or not. But from a professional point of view, there are many factors that affect whether the lights are on or off.

　　The brightness is more inclined to the human eye's perception of light, and the illuminance is the amount of light actually emitted by the lamp.

　　Illumination is expressed by luminous flux ( LX ), and the unit is LM/ ㎡, which is lumens / square meter. The formula is: 1Lx=1 Lm/ ㎡. In layman's terms, it is the amount of light per unit area that the human eye can see.

　　Assuming that the object is uniformly illuminated by light, then, when the luminous flux obtained on 1 square meter is 1 lumens, its illuminance is 1 lux.

　　For example, we recommend that the illuminance required for general activity lighting in the home is 100LX , which is 100LM/ ㎡. The lighting contrast requirements for writing and reading tasks are relatively high, requiring 300LX , which is 300LM/ ㎡.

　　Watts

　　It is relatively accurate to measure brightness by illuminance, but this value is generally not marked on the product details, and everyone has no concept of illuminance. For home use, it can be roughly measured by wattage.

　　Under normal circumstances, under the same other conditions, the higher the wattage, the brighter the lamp. (The higher the wattage, the more electricity it costs)

　　Take the LED light source as an example: the lighting space with the main light is recommended to be 3~3.5W per square meter. Without the main light, it can be calculated at 2.5~3W per square meter , with ceiling lights or downlights / spotlights.

　　In the case of meeting the wattage, compare the LED bulb parameters, select the high luminous flux (or lumens value, different names written by different manufacturers), the higher the luminous flux (lumen value), the brighter the bulb.

　　Color rendering

　　The color rendering index is a very important but often ignored parameter, which reflects whether the lighting effect is good enough. It shows the color reproduction performance of the light source, the highest color rendering under the sun, which is 100Ra .

　　The light source with the more complete spectrum has better color rendering: among artificial light, the color rendering of incandescent light is the best, and the color rendering of energy-saving lamps is relatively poor.

　　The requirements for color rendering index in residential lighting specifications are as follows ( Ra column).

　　The color rendering index ( CRI ) is expressed by the value of Ra . If it is a general activity space, choose products with Ra ≥ 80 (≥ 85 is better).

　　For those with budget or related quality pursuits, such as dining table, reading room, cloakroom, and meticulous operation space, choose Ra ≥ 90 , which can make food look better, read for a long time more comfortable, and choose clothes and colors more accurately.

　　For supplementary light sources, night lights, or ambient light sources, the CRI and brightness requirements can be reduced.

　　Two, indoor lighting classification

　　Ambient light

　　Ambient light is the conventional light source with the largest range of illumination. The direct light source and direction cannot be seen clearly, and it has soft illumination. This kind of light source is not missing in almost any family, and it is even the only kind of light source, which is what we often call the main light.

　　It is a pity that there are a large number of cases of one room and one lamp until today, let's call it the "indoor lighting 1.0 era".

　　This simple and rude lighting arrangement can certainly solve basic lighting problems. In actual use, it will look like the picture below: bad experience and many inconveniences.

　　Contour light

　　Contour light is mainly used to emphasize the contours of walls, ceilings, wardrobes, etc., to create a sense of spatial hierarchy and increase the aesthetics of the indoor form.

　　Simply put, it is to make your home look taller, bigger and more advanced.

　　It can be said that the contour light is the beauty pen in the interior. In addition to making the interior space more stylish, it can also add auxiliary lighting to the ambient light to achieve the high-level effect of seeing the light but not the light. This is why almost all star hotels adopt no main light design. Cooperate with various contour lights.

　　Focus light

　　The lighting range is relatively small, and the light is relatively concentrated, focusing on creating a local atmosphere.

　　The focus light mostly uses direct lighting, with strong illuminance and small range, forming a strong contrast with the surrounding environment, just like a stage spotlight.