The conversion of 5000 lux to lumen depends on the area over which the lux is measured. Since lux measures luminous flux per square meter, if the area is 1 square meter, 5000 lux equals 5000 lumens.
Lux and lumen are related but different units; lux measures illuminance (light intensity on a surface), while lumen measures luminous flux (total light output). To convert lux to lumen, multiply lux by the area in square meters.
Conversion Tool
Result in lumen:
Conversion Formula
Lux (lx) is the measure of illuminance, which means how much luminous flux falls on a certain area. Lumen (lm) is the measure of luminous flux, the total amount of light emitted by a source. The formula to convert lux to lumen is:
Lumen (lm) = Lux (lx) × Area (m²)
This works because lux equals lumens per square meter, so multiplying the lux value by the surface area gives total lumens. For example, if you have 5000 lux shining on 2 square meters, the lumens equals 5000 × 2 = 10,000 lumens.
Conversion Example
- Convert 3000 lux on a 1.5 m² surface:
- Multiply 3000 lux × 1.5 m²
- Result: 4500 lumens
- Convert 7000 lux on a 0.8 m² surface:
- 7000 × 0.8 = 5600 lumens
- Convert 1200 lux on a 3 m² surface:
- 1200 × 3 = 3600 lumens
- Convert 8500 lux on 0.5 m²:
- 8500 × 0.5 = 4250 lumens
- Convert 4000 lux on 2.2 m²:
- 4000 × 2.2 = 8800 lumens
Conversion Chart
The table below shows lux values from 4975.0 to 5025.0 converted to lumens assuming an area of 1 square meter. To use the chart, find the lux value in left column and read the corresponding lumen value in the right column.
| Lux (lx) | Lumen (lm) |
|---|---|
| 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 |
Related Conversion Questions
- How to convert 5000 lux to lumens for a 2 m² surface?
- What is the lumen output when 5000 lux is measured on 0.5 square meters?
- Does 5000 lux correspond to 5000 lumens or not?
- How does surface area affect converting 5000 lux to lumens?
- Can I use 5000 lux value directly as lumens without area information?
- What is the formula to calculate lumens from 5000 lux on different areas?
- How many lumens equals 5000 lux over 3 square meters?
Conversion Definitions
Lux: Lux is a unit measuring illuminance, the intensity of light on a surface, defined as one lumen per square meter. It indicates how brightly an area is lit, considering the area over which light spreads. Lux helps assess lighting conditions in environments for visibility and comfort.
Lumen: Lumen measures luminous flux, representing total light emitted by a source in all directions. It quantifies the perceived power of light, independent of area, used for rating brightness of bulbs and lighting devices. One lumen equals one candela per steradian.
Conversion FAQs
Why does converting lux to lumen need area?
Because lux measures light intensity per unit area (lumens per square meter), you cannot get total lumens without knowing how many square meters are lit. Lux alone tells intensity, but total luminous flux in lumens depends on the surface size receiving the light.
Can I assume 1 lux equals 1 lumen?
No, 1 lux equals 1 lumen per square meter. So if the lit area is exactly 1 square meter, then 1 lux equals 1 lumen. If the area changes, that equivalence breaks, so knowing the area is necessary to convert correctly.
What happens if area isn’t known when converting 5000 lux?
Without area, you cannot calculate lumens from lux because lux is inherently dependent on area. Any conversion without area is incomplete or inaccurate. You must obtain or estimate the surface area illuminated.
Are lux and lumen interchangeable terms?
No, they measure different properties: lux measures illuminance (light per area), lumen measures total light output. Confusing them may lead to errors especially in lighting design and measurement.
How to measure the area for lux to lumen conversion?
The area is the physical surface where illuminance is measured. It can be calculated by measuring length and width of the surface in meters and multiplying them. For irregular shapes, approximate the area by dividing into simpler shapes, then sum them.
Last Updated : 22 July, 2025
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Sandeep Bhandari holds a Bachelor of Engineering in Computers from Thapar University (2006). He has 20 years of experience in the technology field. He has a keen interest in various technical fields, including database systems, computer networks, and programming. You can read more about him on his bio page.