Lux Converter
Convert Lux to Phot and more • 37 conversions
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Unit Explanations
Luxlx
Source UnitThe lux (symbol: lx) is the SI unit of illuminance and luminous emittance, defined as one lumen per square meter. This unit quantifies the amount of visible light that illuminates a surface area, providing an essential measure for lighting design and assessment. The lux is integral to various fields, including photography, cinematography, and interior design, as it helps determine the adequacy of lighting in spaces. A well-lit environment typically requires illuminance levels ranging from 100 to 1000 lux, depending on the activity being performed. Thus, the lux not only conveys the intensity of light but also directly correlates with human visual comfort and productivity.
Current Use
The lux is widely used in various industries to ensure that lighting conditions meet specific standards for safety, comfort, and productivity. In architectural lighting design, lux levels are meticulously calculated to optimize illumination in spaces such as offices, schools, and hospitals. The film and photography industries rely on lux measurements to ensure proper lighting conditions for shoots, while horticulture utilizes lux for assessing light requirements for plant growth. In the automotive industry, lux is crucial for assessing headlight brightness and visibility. Countries around the world, including the United States, Germany, and Japan, apply lux standards in building codes and regulations to ensure adequate lighting in public and private spaces. Regulatory bodies often specify minimum lux levels for various environments, ensuring compliance with safety and quality standards.
Fun Fact
The human eye can perceive light levels ranging from about 0.1 lux (moonlight) to over 100,000 lux (bright sunlight).
Photph
Target UnitThe phot is a non-SI unit of illuminance, representing the intensity of light incident on a surface per unit area. Specifically, it is defined as one lumen per square meter (lm/m²). This unit is particularly useful in fields like photography, cinematography, and visual arts, where precise control over lighting conditions is essential. The phot aims to quantify the perceived brightness of light as experienced by the human eye, making it distinct from other units of illuminance such as the lux. The phot was widely adopted in the mid-20th century and remains relevant in specific applications despite the predominance of the lux in scientific contexts.
Current Use
Today, the phot is used primarily in fields that require a nuanced understanding of light application, such as photography, film, and theater lighting. It is particularly advantageous in scenarios where precise lighting conditions significantly impact the visual outcome. For instance, cinematographers may refer to phot levels when configuring lighting setups for film production, ensuring that the light intensity matches the artistic vision. Additionally, the phot is sometimes encountered in historical texts and studies focusing on photometry, illustrating its lasting influence even as the lux becomes more predominant. While it is not commonly used in scientific research, the phot's relevance persists in practical applications, especially in creative industries where light manipulation is crucial to success.
Fun Fact
The phot is rarely used in scientific literature today but remains a nostalgic term in photography.
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📐Conversion Formula
= × 1.00000How to Convert
To convert to , multiply the value by 1.00000. This conversion factor represents the ratio between these two units.
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Lux
illumination • SI Unit
Definition
The lux (symbol: lx) is the SI unit of illuminance and luminous emittance, defined as one lumen per square meter. This unit quantifies the amount of visible light that illuminates a surface area, providing an essential measure for lighting design and assessment. The lux is integral to various fields, including photography, cinematography, and interior design, as it helps determine the adequacy of lighting in spaces. A well-lit environment typically requires illuminance levels ranging from 100 to 1000 lux, depending on the activity being performed. Thus, the lux not only conveys the intensity of light but also directly correlates with human visual comfort and productivity.
History & Origin
The concept of measuring light dates back to ancient civilizations, but the formal introduction of the lux occurred in the 20th century. The unit was officially defined in 1948 during the International Conference on Weights and Measures in Paris, where it was adopted as part of the International System of Units (SI). Before the lux, illuminance was often measured using different units like foot-candles, which were less standardized. The establishment of the lux aimed to create a uniform measurement standard for scientific and practical applications in lighting.
Etymology: The term 'lux' comes from the Latin word for 'light'.
Current Use
The lux is widely used in various industries to ensure that lighting conditions meet specific standards for safety, comfort, and productivity. In architectural lighting design, lux levels are meticulously calculated to optimize illumination in spaces such as offices, schools, and hospitals. The film and photography industries rely on lux measurements to ensure proper lighting conditions for shoots, while horticulture utilizes lux for assessing light requirements for plant growth. In the automotive industry, lux is crucial for assessing headlight brightness and visibility. Countries around the world, including the United States, Germany, and Japan, apply lux standards in building codes and regulations to ensure adequate lighting in public and private spaces. Regulatory bodies often specify minimum lux levels for various environments, ensuring compliance with safety and quality standards.
💡 Fun Facts
- •The human eye can perceive light levels ranging from about 0.1 lux (moonlight) to over 100,000 lux (bright sunlight).
- •The term 'foot-candle', an older unit of illuminance, is equivalent to approximately 10.764 lux.
- •In photography, achieving the right lux levels can significantly impact the quality of images captured.
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Phot
illumination • Non-SI
Definition
The phot is a non-SI unit of illuminance, representing the intensity of light incident on a surface per unit area. Specifically, it is defined as one lumen per square meter (lm/m²). This unit is particularly useful in fields like photography, cinematography, and visual arts, where precise control over lighting conditions is essential. The phot aims to quantify the perceived brightness of light as experienced by the human eye, making it distinct from other units of illuminance such as the lux. The phot was widely adopted in the mid-20th century and remains relevant in specific applications despite the predominance of the lux in scientific contexts.
History & Origin
The phot originated from the need to quantify light levels in the early 20th century when optical technologies were rapidly evolving. The recognition of the importance of light measurements in photography and other visual arts led to the establishment of standardized units. The phot was introduced as a practical means to facilitate these measurements, allowing artists, scientists, and engineers to communicate effectively about lighting conditions. Its adoption paralleled advancements in photometry and the development of instruments designed to measure light intensity and distribution accurately.
Etymology: The term 'phot' is derived from the Greek word 'phōs,' meaning light. This etymology reflects the unit's primary focus on the measurement of light in various applications, emphasizing its importance in both scientific and artistic fields.
Current Use
Today, the phot is used primarily in fields that require a nuanced understanding of light application, such as photography, film, and theater lighting. It is particularly advantageous in scenarios where precise lighting conditions significantly impact the visual outcome. For instance, cinematographers may refer to phot levels when configuring lighting setups for film production, ensuring that the light intensity matches the artistic vision. Additionally, the phot is sometimes encountered in historical texts and studies focusing on photometry, illustrating its lasting influence even as the lux becomes more predominant. While it is not commonly used in scientific research, the phot's relevance persists in practical applications, especially in creative industries where light manipulation is crucial to success.
💡 Fun Facts
- •The phot is rarely used in scientific literature today but remains a nostalgic term in photography.
- •The phot was developed around the same time as the first electronic cameras were being invented.
- •The human eye can perceive light levels as low as 0.01 phot under ideal conditions.
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Frequently Asked Questions
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