1300 lumen equals 1300 lux when the light is evenly spread over an area of 1 square meter.
Lumens measure total light output from a source, while lux measures illuminance or how much light falls on a surface. Since 1 lux equals 1 lumen per square meter, converting lumen to lux requires knowing the illuminated area. For a 1 m² area, 1300 lumen equals 1300 lux.
Conversion Tool
Result in lux:
Conversion Formula
The conversion between lumen (lm) and lux (lx) depends on the area over which the light is spread. Lux is defined as lumens per square meter. The formula:
Lux = Lumens ÷ Area (in square meters)
This formula works because lumen measures total light emitted by a source, while lux measures intensity on a surface. For example, if 1300 lumens is evenly distributed over 1 square meter:
- Lux = 1300 lm ÷ 1 m²
- Lux = 1300 lx
If the area increases, lux decreases since light is spread thinner. For example, if the same 1300 lumens spread over 2 m²:
- Lux = 1300 lm ÷ 2 m² = 650 lx
Conversion Example
- Convert 500 lumens to lux over 1 m²:
- Divide 500 by 1
- Result: 500 lux
- Convert 1000 lumens to lux over 4 m²:
- Divide 1000 by 4
- Result: 250 lux
- Convert 2000 lumens to lux over 0.5 m²:
- Divide 2000 by 0.5
- Result: 4000 lux
- Convert 750 lumens to lux over 3 m²:
- Divide 750 by 3
- Result: 250 lux
- Convert 1800 lumens to lux over 2.25 m²:
- Divide 1800 by 2.25
- Result: 800 lux
Conversion Chart
| Lumen (lm) | Lux (lx) at 1 m² |
|---|---|
| 1275.0 | 1275.0 |
| 1280.0 | 1280.0 |
| 1285.0 | 1285.0 |
| 1290.0 | 1290.0 |
| 1295.0 | 1295.0 |
| 1300.0 | 1300.0 |
| 1305.0 | 1305.0 |
| 1310.0 | 1310.0 |
| 1315.0 | 1315.0 |
| 1320.0 | 1320.0 |
| 1325.0 | 1325.0 |
This chart shows lumen values from 1275 to 1325 with their equivalent lux values assuming the light spreads evenly over 1 square meter. To use, find the lumen value closest to yours, and the lux value will be the same under these conditions.
Related Conversion Questions
- How many lux is 1300 lumens spread over 2 square meters?
- What is the lux value of 1300 lumens on a 0.5 m² surface?
- Can 1300 lumens produce 1300 lux on any surface size?
- How does area affect converting 1300 lumens to lux?
- Is 1300 lumens equal to 1300 lux outdoors?
- What lux level results from 1300 lumens on a 3 m² desk?
- How to convert 1300 lumen light to lux in a room?
Conversion Definitions
Lumen: Lumen is a unit measuring the total quantity of visible light emitted by a source per second. It quantifies the brightness perceived by the human eye from the light source, regardless of the direction in which the light travels. Higher lumen means more light output.
Lux: Lux measures illuminance, representing how much luminous flux falls on a unit area, one square meter. One lux equals one lumen per square meter. It shows how brightly a surface is lit, and depends on both the light amount and the area illuminated.
Conversion FAQs
Does the shape of the surface change lumen to lux conversion?
The shape does not directly affect the numerical conversion between lumen and lux; lux depends on the area illuminated. However, irregular shapes might cause uneven light distribution, so the lux value may vary across different parts of the surface. The formula assumes uniform light distribution.
Can I convert lumen to lux without knowing the area?
No, converting lumen to lux requires knowing the surface area where the light spreads. Lumens measure total light output, but lux depends on how that light is distributed over area. Without the area, conversion can’t be accurately made.
Why is 1 lumen equal to 1 lux only on 1 square meter?
Because lux measures lumens per square meter, if a single lumen is spread over exactly 1 m², the illuminance is 1 lux. If the area increases, the same lumen covers more space, reducing lux. If the area decreases, lux increases for the same lumen amount.
Does ambient lighting affect lumen to lux conversion?
Ambient lighting doesn’t change the mathematical conversion, but it affects the perceived brightness on a surface. Lux measures illuminance from a specific source on an area. Multiple light sources add together their lux values, but conversion formulas treat only the given lumen and area.
Are lumens and lux used interchangeably?
No, they measure related but different things. Lumens indicate total light output of a source, lux measures how much light falls on a surface area. Interchanging them without considering area leads to incorrect assumptions about brightness.