Candela to lux calculator
Convert luminous intensity in candelas (cd) to illuminance in lux (lx) effortlessly. Ideal for lighting design, photometry, and light measurement calculations. Accurately convert candela to lux using this convenient online tool.
what is Candela to lux
Candela (cd) and lux (lx) are both units of measurement related to light. The candela is a unit that measures the intensity or brightness of light emitted by a light source in a particular direction. Lux, on the other hand, is a unit that measures the illuminance or the amount of light that falls on a surface.
To convert from candela to lux, you need to know the distance between the light source and the surface you are measuring. The formula for this conversion is as follows:
Lux = Candela / (Distance in meters)^2
Keep in mind that this formula assumes that the light is evenly distributed over the surface being measured. If the light source is not emitting light uniformly in all directions, or if the surface is not perpendicular to the light source, the lux value may vary.
It's important to note that candela and lux are related but measure different aspects of light. Candela measures the brightness of a light source, while lux measures the amount of light falling on a surface.
Candela to lux calculation with distance in feet
The illuminance Ev in lux (lx) is equal to 10.76391 times the luminous intensity Iv in candela (cd),
divided by the square distance from the light source d2 in square feet (ft2):
Ev(lx) = 10.76391 × Iv(cd) / (d(ft))2
So
lux = 10.76391 × candela / square feet
Or
lx = 10.76391 × cd / ft2
Candela to lux calculation with distance in meters
The illuminance Ev in lux (lx) is equal to the luminous intensity Iv in candela (cd),
divided by the square distance from the light source d2 in square meters (m2):
Ev(lx) = Iv(cd) / (d(m))2
So
lux = candela / square meters
Or
lx = cd / m2
Candela to lux Example
Assuming you have a light source with different luminous intensities in Candela (cd) and you want to convert them to Lux (lx), you can use the following table:
| Luminous Intensity (cd) | Distance (m) | Illuminance (lx) |
|---|---|---|
| 1000 | 1 | 1000 |
| 500 | 2 | 62.5 |
| 200 | 3 | 8.89 |
| 100 | 5 | 4 |
To convert the luminous intensity to illuminance, you need to consider the distance from the light source.
Multiply the square of the distance by the luminous intensity for each value to obtain the illuminance.
For example, if the luminous intensity is 1000 cd and the distance is 1 meter, the illuminance would be (1000 cd) / (1^2 m^2) = 1000 lx.
Similarly, for a luminous intensity of 500 cd and a distance of 2 meters, the illuminance would be (500 cd) / (2^2 m^2) = 62.5 lx.
You can follow the same calculation for other values in the table.
Please note that this conversion assumes an idealized point light source and that the light spreads uniformly in all directions. In practical scenarios, the actual illuminance may vary depending on the specific characteristics of the light source and the lighting environment.
