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Do you know? How amazing is the illumination the sun's light can achieve on the earth?
In daily life, we may not pay special attention to the surrounding lighting environment, but in fact, the intensity of light is closely related to the quality of our life. Not only does it affect our mood and health, it also plays a vital role in our work environment. So, how amazing is the illumination of light? According to measurements, the illumination of sunlight on the earth's surface can be as high as 100,000 lux, which is a quite astonishing number.
The illuminance of light is usually expressed in the unit "lux" (lx), which is the number of lumens received per square meter.
To understand the meaning of this number, we need to first understand the basic concept of illuminance. Illuminance (lx) measures the intensity of light on an area and is closely related to the distance from the light source and other environmental factors. When the equipment is fixed and the light source is changing, the change in illumination can be analyzed from these two perspectives. On the one hand, the intensity of the light source affects the illumination; on the other hand, the diffusion area of the light also changes the illumination.
For example, suppose a light source emits 1000 lumens of light. When this light illuminates an area of 1 square meter uniformly, the illumination of the area can reach 1000 lux. But if this light is dispersed over an area of 10 square meters, the illumination will drop to 100 lux. From this example, we can clearly see the impact of focal length and illuminated area.
The strongest sunlight has an illumination of up to 100,000 lux on the earth's surface, which is why sunlight is considered the strongest natural light source.
So, what impact does such high illumination have on our lives? In fact, this not only affects our vision, but also has a significant impact on our physical health. Research shows that sufficient natural light can promote physical health, improve the body's biological clock, and enhance emotional state. Sometimes, we just need to spend some time in the sun to feel happy and comfortable.
For indoor lighting, different environments have different requirements. In a home, normal kitchen lighting should be able to reach 500 lux, while lighting in large factories requires higher lumens. For example, in order to maintain such brightness in a kitchen, a light fixture with a light output of 12,000 lumens must be installed. In contrast, due to the large area of a factory, dozens of lamps may be needed to meet the same illumination requirements.
To provide sufficient illumination, appropriate lighting and layout design become particularly important.
In addition to focusing on the light source and distance when calculating lighting, the positional relationship between the surface and the light source is also crucial. For example, if you point a flashlight at a wall and make it vertical, the lighting effect will be relatively better. However, if you tilt the flashlight, the illuminated area increases and the brightness decreases, showing the effect of the angle between the light source and the surface on the illumination.
In addition to the currently used units of lumens and lux, there are other measurement standards related to light. For example, "foot-candle", which is the amount of light received per square foot, is based on the American system. Relative to a foot-candle, 1 lux is approximately equal to 0.092903 foot-candle.
In some situations, understanding different illumination units and measurement methods can help us better design and plan the lighting layout in our living environment. For professional photographers, it is also crucial to understand the requirements of photography equipment under different lighting conditions, because the minimum illumination standards required by some cameras for optimal photography environments rely on the calculation of lux.
In general, the rays of sunlight are crucial to our lives. It not only affects the atmosphere of the environment, but also affects health and mood. While we enjoy natural light, we should also learn how to rationally use and design artificial lighting environments to create a more comfortable living and working space. So, have you ever considered adjusting the lighting around you again to create a healthier living space?
