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Single conversion
To convert from Lux (lx) to Foot-candle (ft-cd), use the following formula:
With is the ratio between the base units Foot-candle (ft-cd) and Lux (lx).
Let's convert 5 Lux (lx) to Foot-candle (ft-cd).
Using the formula:
Therefore, 5 Lux (lx) is equal to Foot-candle (ft-cd).
Here are some quick reference conversions from Lux (lx) to Foot-candle (ft-cd):
| Lux | Foot-candles |
|---|---|
| 0.000001 lx | ft-cd |
| 0.001 lx | ft-cd |
| 0.1 lx | ft-cd |
| 1 lx | ft-cd |
| 2 lx | ft-cd |
| 3 lx | ft-cd |
| 4 lx | ft-cd |
| 5 lx | ft-cd |
| 6 lx | ft-cd |
| 7 lx | ft-cd |
| 8 lx | ft-cd |
| 9 lx | ft-cd |
| 10 lx | ft-cd |
| 20 lx | ft-cd |
| 30 lx | ft-cd |
| 40 lx | ft-cd |
| 50 lx | ft-cd |
| 100 lx | ft-cd |
| 1000 lx | ft-cd |
| 10000 lx | ft-cd |
For all Illuminance converters, choose units using the From/To dropdowns above.
Have you ever wondered how experts decide how bright the lights should be in an office or a movie studio?
The answer often comes down to a measurement called lux.
Lux (lx) is the standard unit used to measure illuminance—the total amount of visible light that hits a specific surface.
In simple terms, it measures how bright a light appears when it lands on something, like your desk or the floor.
Think of it like this: lumens measure the total amount of light coming from a source, while lux tells you how much of that light is actually landing on a specific area.
This measurement is crucial in many fields, from lighting design and photography to growing plants indoors.
The measurement of lux is directly connected to lumens, which measure the total light output from a source.
The formula is straightforward:
One lux is equal to one lumen distributed evenly over an area of one square meter.
This can be written as: 1 lx = 1 lm/m<sup>2</sup>.
This simple lux to lumen formula is essential for calculating and ensuring the correct lighting levels for any space or activity.
Measuring lux is vital for creating safe, efficient, and optimal lighting conditions across various industries.
To prevent eye strain and accidents, companies use lux measurements to ensure lighting levels meet workplace safety standards.
This helps create a comfortable and productive environment for employees in offices and factories.
In indoor farming and greenhouses, providing the right light is critical.
Since each plant has unique light intensity needs, measuring lux allows growers to fine-tune the environment, optimizing plant growth and maximizing crop yields.
In photography and filmmaking, lighting is everything.
Cinematographers and photographers use lux measurements to control exposure and create the desired mood in a scene. Consistent lux levels ensure every shot looks exactly as intended.
To get precise readings, professionals use a special tool called a lux meter.
This handheld device has a sensor that you can place on any surface to measure the illuminance in lux instantly.
A lux meter takes the guesswork out of determining if a space is adequately lit for its intended purpose.
A foot-candle (ft-cd) is the standard unit of illuminance, or light intensity, in the imperial system.
It's a fundamental concept used in lighting design to ensure spaces are adequately lit.
A foot-candle measures the amount of light that falls onto a specific surface.
To be precise, one foot-candle is the illuminance on a one-square-foot surface from a uniform light source of one candela that is exactly one foot away.
This direct relationship makes the foot-candle an intuitive unit for creating lighting plans in the imperial system.
It's important not to confuse foot-candles with lumens. While lumens measure the total light output from a source (like a lightbulb), foot-candles measure how much of that light actually reaches a surface.
The foot-candle is the imperial counterpart to the lux (lx), which is the standard unit for illuminance in the SI or metric system.
Since many lighting specifications are international, understanding how to convert between them is essential.
The conversion is straightforward:
For quick reference, here's a simple comparison table:
| Feature | Foot-candle (ft-cd) | Lux (lx) |
|---|---|---|
| System | Imperial | SI / Metric |
| Definition | 1 lumen / square foot | 1 lumen / square meter |
| Conversion | 1 ft-cd ≈ 10.764 lx | 1 lx ≈ 0.0929 ft-cd |
Using foot-candle measurements ensures that different environments are lit correctly for safety, comfort, and function.
Lighting standards often provide recommendations for various spaces. Here are a few common examples: