550 lux equals 550 lumen when the illuminated area is exactly 1 square meter.
Lux measures illuminance or how much light falls on a surface, while lumen measures the total amount of visible light emitted by a source. To convert lux to lumen, you multiply the lux value by the surface area in square meters that the light covers.
Conversion Tool
Result in lumen:
Conversion Formula
The formula to convert lux to lumen is:
Lumen (lm) = Lux (lx) × Area (m²)
Lux measures the amount of light that hits a surface per unit area, lumen measures total light output. So, lux multiplied by the surface area in square meters gives the total light output in lumens.
For example, if a surface of 1 square meter is illuminated with 550 lux:
- Lux = 550 lx
- Area = 1 m²
- Lumen = 550 × 1 = 550 lm
Conversion Example
- Convert 300 lux to lumen over 2 square meters:
- Lux = 300 lx
- Area = 2 m²
- Lumen = 300 × 2 = 600 lm
- Convert 1000 lux to lumen over 0.5 square meters:
- Lux = 1000 lx
- Area = 0.5 m²
- Lumen = 1000 × 0.5 = 500 lm
- Convert 750 lux to lumen over 1.5 square meters:
- Lux = 750 lx
- Area = 1.5 m²
- Lumen = 750 × 1.5 = 1125 lm
- Convert 425 lux to lumen over 3 square meters:
- Lux = 425 lx
- Area = 3 m²
- Lumen = 425 × 3 = 1275 lm
Conversion Chart
| Lux (lx) | Lumen (lm) (Area = 1 m²) |
|---|---|
| 525.0 | 525.0 |
| 530.0 | 530.0 |
| 535.0 | 535.0 |
| 540.0 | 540.0 |
| 545.0 | 545.0 |
| 550.0 | 550.0 |
| 555.0 | 555.0 |
| 560.0 | 560.0 |
| 565.0 | 565.0 |
| 570.0 | 570.0 |
| 575.0 | 575.0 |
This chart shows lux values from 525 to 575, directly converted to lumen assuming the light falls on an area of 1 square meter. To use the chart, find your lux value and see the corresponding lumen output, which equals lux times the surface area.
Related Conversion Questions
- How many lumen are in 550 lux if the surface area is 2 square meters?
- What is the difference between lux and lumen for 550 lux lighting?
- Can I convert 550 lux to lumen without knowing the area?
- How does area affect converting 550 lux to lumen?
- If I have 550 lux lighting, how many lumen do I need for 3 m²?
- Is 550 lux equal to 550 lumen always?
- How to calculate lumen from 550 lux in a room with 4 square meters?
Conversion Definitions
Lux: Lux is a unit measuring illuminance, which is the amount of visible light falling on a surface per unit area. It measures brightness as perceived by the human eye, quantifying how much light is spread over the area, expressed as lumens per square meter.
Lumen: Lumen is a unit measuring luminous flux, which represents the total quantity of visible light emitted by a source in all directions. It tells how much light a lamp or bulb produces, without accounting for the area the light covers.
Conversion FAQs
What happens if the surface area is not 1 square meter when converting 550 lux to lumen?
The result changes because lux depends on the amount of light per unit area. When the area is larger, the total lumen increases proportionally. For example, 550 lux over 2 square meters equals 1100 lumens, doubling the amount of light because the area is twice.
Can lux be higher than lumen for the same light source?
No, lux can’t be higher than lumen because lux measures light intensity per area, while lumen measures total light output. If the area is very small, lux value will be high, but total lumen remains constant reflecting the overall light emitted.
Is it possible to convert lumen directly to lux without area?
No, you need the illuminated surface area to convert lumen to lux. Lumen tells total light output; lux depends on how that light is spread over an area. Without area, the conversion is incomplete and can’t be accurately done.
Why does a 550 lux reading not always mean the same lumen output?
Because lux varies with the area illuminated. The same lux level on different areas results in different lumen values. For instance, 550 lux on 1m² equals 550 lumen, but on 5m² equals 2750 lumen, showing that total light depends on size of surface.
Does ambient lighting affect lux-to-lumen conversion?
Ambient lighting can affect lux measurements but does not change lumen output of the source. Lux is influenced by all light reaching a surface, including reflections and other sources, so measuring lux in ambient light gives combined effect, not just the lumen of one source.