Illuminance meaning

Illuminance refers to the level of light intensity on a surface, measured in lux.


Illuminance definitions

Word backwards ecnanimulli
Part of speech Noun
Syllabic division il-lu-mi-nance
Plural The plural of the word illuminance is illuminances.
Total letters 11
Vogais (4) i,u,a,e
Consonants (4) l,m,n,c

When it comes to lighting design and measurement, one of the key factors to consider is illuminance. Illuminance refers to the amount of light that falls on a surface. It is measured in lux (lx) or foot-candles (fc). Lux is the standard international unit of measurement for illuminance, with one lux equaling one lumen per square meter. On the other hand, foot-candles are commonly used in the United States, with one foot-candle equaling one lumen per square foot.

Illuminance plays a crucial role in determining the overall brightness and visibility of a space. Proper illuminance levels are essential for ensuring safety, productivity, and comfort in various environments such as offices, schools, hospitals, and homes. Insufficient illuminance can lead to eye strain, fatigue, and decreased performance, while excessive illuminance can cause glare and discomfort.

Factors influencing illuminance

Several factors can influence illuminance levels in a space. The type and wattage of light sources, the distance between the light source and the surface, the reflectance of surfaces, and the presence of any obstacles that may block or diffuse light can all impact illuminance. Understanding these factors is essential for achieving optimal lighting conditions.

Measuring illuminance

To measure illuminance, a light meter is used to quantify the amount of light falling on a surface. Light meters can provide instant readings in lux or foot-candles, allowing designers and engineers to assess the lighting conditions accurately. By measuring illuminance levels, adjustments can be made to the lighting design to meet specific requirements and standards.

Importance of illuminance in lighting design

Illuminance is a critical parameter in lighting design as it directly impacts the visual comfort and functionality of a space. By carefully considering illuminance levels, designers can create lighting schemes that enhance visibility, mood, and aesthetics while ensuring the well-being of occupants. Whether designing a workspace, a retail store, or a residential setting, illuminance should be a primary consideration for achieving an optimal lighting environment.

In conclusion, illuminance is a fundamental aspect of lighting design that influences the overall quality of light in a space. By understanding and measuring illuminance levels, designers can create well-lit environments that promote safety, well-being, and productivity. Considering factors that affect illuminance and adjusting lighting designs accordingly can lead to successful lighting solutions for various applications.


Illuminance Examples

  1. The illuminance in the room was too bright for reading.
  2. The illuminance level in photography studios is carefully controlled for optimal lighting conditions.
  3. The illuminance meter displayed a reading of 500 lux in the office.
  4. The illuminance from the streetlights outside provided a soft glow in the living room.
  5. The illuminance of the moonlight created a mesmerizing scene in the night sky.
  6. The illuminance of the sun on a clear day can reach up to 100,000 lux.
  7. The illuminance of the stage lights bathed the performers in a warm glow.
  8. The illuminance of the candles set a romantic mood for the dinner table.
  9. The illuminance of the fireworks lit up the sky in a colorful display.
  10. The illuminance of the LED bulbs in the room could be adjusted with a dimmer switch.


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  • Updated 29/03/2024 - 19:56:53