Lighting is crucial in setting the ambiance, improving visibility, and influencing our mood in different spaces. One common challenge for those seeking to understand or control lighting is nigating through the technical jargon—terms like Candela, Lux, and Lumens are often used interchangeably. However, they each represent distinct aspects of lighting.
This article aims to explore these differences in detail, helping you understand how to make the most informed decisions when considering lighting options.
Understanding Light Units: Candela, Lux, and Lumens
To achieve the desired lighting effect in any space, whether it's your home, workplace, or outdoor area, understanding the fundamental units of light—坎德拉、勒克斯和流明—is vital. These units measure different light components, and knowing how they interact can give you a more nuanced approach to lighting design and application.
By understanding the distinctions among these three terms, you can optimize the lighting in your spaces, contributing to aesthetics, productivity, and overall comfort.
Buckle up as we delve into light measurements, distinguishing between Candela, Lux, and Lumens.
什么是坎德拉？坎德拉表示光源的发光强度。这个术语源于拉丁语“Candela”，让人想起蜡烛的强度。例如，大约一坎德拉等于一根蜡烛的亮度。
简单来说，坎德拉测量特定方向或角度的光强度。可视化将光精确引导到特定路径的激光。这解释了为什么激光束或聚光灯的坎德拉等级最高。
力士是什么？Lux (lx) is the unit for measuring illumination, representing the light reflected per square meter.
要获得勒克斯等级，必须考虑房间的面积或光源与特定点的距离。在这种情况下，勒克斯值与距离的平方成反比。因此，随着距离的增加，勒克斯值会减小。因此，在小房间中显得明亮的光源在放置在较大空间中时可能无法保持相同的亮度水平。
在数学术语中，勒克斯表示为 1 lx = 1 lm/m^2，勒克斯值取决于流明 (lm)。让我们继续讨论流明以更好地了解勒克斯。
什么是流明？Lumens serve as the unit of measurement for Luminous Flux and are widely used to express light intensity. Lumens represent the total output capacity of a light source, encompassing its overall brightness. Unlike Candela (cd), Lumens does not calculate illumination from a specific direction. Instead, they indicate raw Lumens.
Raw Lumens measure the brightness of a light source from all angles. Consequently, regardless of the light's output direction, the value of Lumens remains constant. Moreover, the Lumens value varies depending on the light's type, color, and power source.
比较坎德拉、勒克斯和流明：揭示区别让我们探讨坎德拉、勒克斯和流明之间的主要差异。请参阅下表进行简要总结：
规格 坎德拉 流明 勒克司 定义 坎德拉是光源在特定角度和方向的亮度级别。 流明表示所有方向的光输出总量。 每平方米面积的照度为勒克斯。 计量单位 发光强度 光通量 照度 符号 (国际单位制) cd lm lx理解关系：坎德拉、勒克斯和流明——揭示它们之间的联系
坎德拉是测量发光强度的单位，而流明和勒克斯分别量化光通量和照度。
简单来说，坎德拉表示光源的亮度，勒克斯衡量光源照射的物体的感知亮度，流明表示光源提供的总体输出。
当谈到距离的影响时，Lumen 和 Lux 的值会受到距离变化的影响，而 Candela 保持不变。这是因为坎德拉的值取决于角度而不是距离。
让我们更深入地研究坎德拉、勒克斯和流明之间的关系，以便更好地理解。
Candela, Lux, and Lumens are all units of measurement for light. Let's explore the relationship between these terms in more detail:
流明 is derived from Candela; both terms measure luminous intensity, representing the brightness of a light source. However, Lumens considers light beams from all directions, whereas Candela focuses on a specific direction.
另一方面，勒克斯是每平方米流明的测量单位。它源自流明，比单独的流明提供更准确的亮度表示。从数学上讲，1 lx = 1 lm/m^2。勒克斯本质上是英尺烛光的公制版本，是坎德拉的旧术语。
衍生自 衍生自 勒克斯 ——————→ 流明 ——————–→ 坎德拉1 lx = 1 流明/米2 = 1 cd·sr/米2
虽然坎德拉、勒克斯和流明具有不同的特性，但它们是相互关联且可转换的。它们之间存在这样的关系：Lux 源自 Lumens，Lumens 源自 Candela。
影响坎德拉、勒克斯和流明值的因素： 距离： 物体和光源之间的距离会影响勒克斯和流明，因为它们的值与距离的平方成反比。然而，坎德拉不受距离的影响，因为它考虑的是角度而不是距离。 辐射角： The angle produced by the light source influences illumination. Smaller angles result in higher values of Candela and Lux, indicating brighter light. Larger angles increase the illuminated area while keeping the Lumens value 不变。 发光效率： 发光效率衡量光源产生明亮光线的能力，取决于瓦数和流明等级。当瓦数值降低时，可以实现更高的发光效率，从而产生更亮的光。 LED 灯条的标准光测量单元：The standard light measuring unit for LED灯条 is Lumens. It is important to oid the common mistake of measuring LED strip brightness solely based on Wattage, as different lights he different luminous efficiency. LED strip performance should be judged by considering Lumens per foot/meter.
流明与瓦数的关系：
流明表示光源的总输出，而瓦数表示光消耗的能量。为了评估光性能，重要的是通过检查流明和瓦数值来考虑光的效率。节能灯泡效率更高，因为它们在消耗更少的能量（瓦数）的同时产生更高的流明。
光效率以流明每瓦 (lm/W) 计算，效率越高，光性能越好，电费越低。
结语Understanding the differences between Candela, Lux, and Lumens is essential for accurately evaluating and selecting lighting solutions. Each unit plays a unique role—Candela measures luminous intensity, Lumens represent the total light output, and Lux indicates the amount of light reaching a surface. Recognizing how these units relate to one another helps eliminate confusion, especially when comparing lighting products or planning lighting layouts for various environments.
By being informed about these measurements, you can make smarter lighting decisions that enhance the aesthetics, functionality, and efficiency of your space—whether it's your home, 办公室或 室外区域.
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