5000 lux corresponds to 5000 lumens when the illuminated area is exactly 1 square meter. This means that if you have a surface of one square meter receiving 5000 lux of illuminance, the total luminous flux falling on that surface is 5000 lumens.
Lux measures the amount of light per unit area, while lumen measures total light output. To convert lux to lumen, you multiply the lux value by the area in square meters. So for 5000 lux over 1 m², the lumen value equals 5000.
Conversion Tool
Result in lumen:
Conversion Formula
The basic formula to convert lux to lumen is:
Lumen (lm) = Lux (lx) × Area (m²)
Lux measures illuminance, which is how much light falls on a surface per square meter. Lumen measures the total light emitted or falling on the surface. Therefore, multiplying lux by the surface area in square meters gives the total luminous flux in lumens.
For example, if an area of 2 m² is receiving 5000 lux, the lumens are calculated as:
- Lux = 5000 lx
- Area = 2 m²
- Lumen = 5000 × 2 = 10000 lm
Conversion Example
Here are some conversion examples:
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Example 1: 3000 lux over 1 m²
- Lux = 3000 lx
- Area = 1 m²
- Lumen = 3000 × 1 = 3000 lm
- The total luminous flux is 3000 lumens.
-
Example 2: 7500 lux over 3 m²
- Lux = 7500 lx
- Area = 3 m²
- Lumen = 7500 × 3 = 22500 lm
- Total flux on the area is 22500 lumens.
-
Example 3: 12000 lux over 0.5 m²
- Lux = 12000 lx
- Area = 0.5 m²
- Lumen = 12000 × 0.5 = 6000 lm
- The luminous flux equals 6000 lumens.
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Example 4: 4500 lux over 2.2 m²
- Lux = 4500 lx
- Area = 2.2 m²
- Lumen = 4500 × 2.2 = 9900 lm
- Total light flux is 9900 lumens.
Conversion Chart
The following table shows lux values around 5000 and their corresponding lumen values assuming an area of 1 square meter. You can see how small changes in lux affect the lumen output directly.
| Lux (lx) | Lumen (lm) at 1 m² |
|---|---|
| 4975.0 | 4975.0 |
| 4980.0 | 4980.0 |
| 4985.0 | 4985.0 |
| 4990.0 | 4990.0 |
| 4995.0 | 4995.0 |
| 5000.0 | 5000.0 |
| 5005.0 | 5005.0 |
| 5010.0 | 5010.0 |
| 5015.0 | 5015.0 |
| 5020.0 | 5020.0 |
| 5025.0 | 5025.0 |
To use the chart, find the lux value in the first column and read across to see the lumen value assuming the surface is exactly 1 square meter. Changes in area will affect the lumen output linearly.
Related Conversion Questions
- How many lumens do I get from 5000 lux on a 2 m² surface?
- What is the lumen output if the lux level is 5000 but the area is 0.8 m²?
- Can 5000 lux be converted to lumens without knowing the area?
- What lumens correspond to 5000 lux on a 5 square meter area?
- How does changing area affect lumens for a constant 5000 lux?
- Is 5000 lux equal to 5000 lumens for all surfaces?
- How to calculate lumens from 5000 lux on irregular shaped areas?
Conversion Definitions
Lux: Lux is a unit measuring illuminance, representing the amount of visible light falling on a surface per square meter. It quantifies how brightly a surface is lit, taking into account the intensity and distribution of light over that area.
Lumen: Lumen is a unit measuring luminous flux, which is the total quantity of visible light emitted by a source or received by a surface. It shows the overall light output without regard to the area it covers.
Conversion FAQs
Can lux be converted to lumens without knowing the surface area?
No, lux cannot be converted directly to lumens without the surface area. Lux indicates light intensity per square meter, while lumens measure total light output. Without knowing the area illuminated, you cannot calculate the total lumens accurately.
Does changing the surface shape affect the lux to lumen conversion?
The shape itself does not directly affect the conversion if you know the exact surface area. However, irregular shapes may make it harder to measure the area precisely, which impacts the accuracy of the lumen calculation.
Why does 5000 lux not always equal 5000 lumens?
Because lux depends on how spread out light is over an area, while lumens represent total light output. If the area is larger or smaller than 1 m², 5000 lux will convert to more or less than 5000 lumens, depending on that area.
Is it possible for two different surfaces with same lux to have different lumens?
Yes, if the two surfaces differ in size. The same lux means the same light intensity per square meter, but the total lumens will vary because lumens depend on how large the surface is.
How accurate is using 1 m² as the area in lux to lumen conversion?
Using 1 m² makes the math straightforward, but in practical cases, the exact area should be measured for accuracy. Assuming 1 m² is fine for standard or simple calculations but may cause errors in real-world scenarios with varying surface sizes.