500 lux converted to lumens depends on the area illuminated. Assuming an area of 1 square meter, 500 lux equals 500 lumens.
Lux measures illuminance, or how much light hits a surface per unit area, whereas lumens measure total light output emitted by a source. To convert lux to lumens, multiply the lux value by the illuminated area in square meters.
Conversion Tool
Result in lumens:
Conversion Formula
The formula to convert lux to lumens is:
Lumens = Lux × Area (m2)
Lux measures the amount of light that falls on a surface per square meter, while lumens measure the total light emitted. So, to find lumens from a lux value, multiply the lux by the surface area in square meters illuminated by the light.
Example calculation:
- Given 500 lux over 1 m² area.
- Lumens = 500 lux × 1 m²
- Lumens = 500 lm
Conversion Example
- Convert 300 lux over 2 square meters:
- Multiply 300 by 2.
- 300 × 2 = 600 lumens.
- This means a light producing 300 lux over 2 m² emits 600 lumens total.
- Convert 750 lux over 0.5 square meters:
- 750 × 0.5 = 375 lumens.
- Less area means fewer total lumens despite high lux.
- Convert 1000 lux over 3 square meters:
- 1000 × 3 = 3000 lumens.
- This shows how large area affects total luminous flux.
Conversion Chart
| Lux (lx) | Lumens (lm) for 1 m² area |
|---|---|
| 475.0 | 475.0 |
| 480.0 | 480.0 |
| 485.0 | 485.0 |
| 490.0 | 490.0 |
| 495.0 | 495.0 |
| 500.0 | 500.0 |
| 505.0 | 505.0 |
| 510.0 | 510.0 |
| 515.0 | 515.0 |
| 520.0 | 520.0 |
| 525.0 | 525.0 |
This chart shows how lumens change with lux value when the area is constant at 1 square meter. You read the lux value on left, then see the equal lumens on right, since lumens = lux × 1 m².
Related Conversion Questions
- How many lumens are in 500 lux over 2 square meters?
- What is the lumen output if 500 lux spreads across 0.75 m²?
- Does 500 lux always equal 500 lumens?
- How to calculate lumens from 500 lux on different surface sizes?
- Is 500 lux brighter than 500 lumens?
- Can I convert 500 lux to lumens without knowing area?
- What’s the difference between 500 lux and 500 lumens in lighting?
Conversion Definitions
Lux: Lux measures illuminance, the amount of light falling on a surface per square meter. It quantifies brightness perceived by the human eye on that surface. One lux equals one lumen per square meter, useful in lighting design and photography to measure light intensity.
Lumens: Lumens quantify the total amount of visible light emitted by a source. It measures the flow of light perceived by human eyesight, regardless of direction. A higher lumen count means brighter light output, used to compare bulbs and lighting fixtures.
Conversion FAQs
Why does converting lux to lumens need the area?
Lux measures light per unit area, while lumens measure total light output. Without knowing how big the surface is, you can’t calculate total lumens from lux because lumens depend on how much surface the light covers. Area bridges lux to lumens.
Can I convert lux to lumens for irregular surfaces?
You can, but it’s more complex. You must estimate or measure the total illuminated area accurately. For irregular shapes, calculating exact area is harder, so lumens from lux may be approximate unless you know the surface size precisely.
Does light intensity change when converted from lux to lumens?
No, the light intensity stays same, but lux and lumens represent different aspects: lux is intensity per area, lumens is total emitted light. The conversion doesn’t change light itself but how it’s measured depending on surface size.
Is the conversion formula valid for all light sources?
The formula works for any light source but assumes uniform illumination across the measured area. If light distribution is uneven, lux readings vary, and the conversion to lumens may not reflect total output accurately.
Why can’t I convert lux to lumens without area information?
Because lux is a measure per square meter, without knowing how many square meters are lit, you don’t know total light output. Lumens measure total light, so area is necessary for the calculation.