1300 lux corresponds to 1300 lumens when the illuminated surface area is exactly 1 square meter. This means if you have a light intensity of 1300 lux over one square meter, the total luminous flux is 1300 lumens.
Lux is a measure of illuminance, indicating how much light falls on a surface per unit area, while lumen measures the total amount of light emitted by a source. The conversion depends on the area illuminated, and when the area is 1 square meter, lux and lumens have the same numeric value.
Conversion Tool
Result in lumen:
Conversion Formula
The relationship between lux and lumen depends on the area illuminated. Lux (lx) is defined as lumens per square meter (lm/m²). The formula to convert lux to lumen is:
Lumen = Lux × Area (in square meters)
This means that if you know the lux value and the area over which the light is spread, multiplying them gives the total luminous flux in lumens. For example, if 1300 lux is spread over 1 square meter, the lumen value is 1300 × 1 = 1300 lumens.
If the area is different, say A m², then the total lumen will be lux times A.
Conversion Example
- Example 1: Convert 500 lux over 2 m²
- Multiply lux by area: 500 × 2 = 1000 lumens
- So, 500 lux over 2 m² equals 1000 lumens.
- Example 2: Convert 750 lux over 0.5 m²
- Calculate: 750 × 0.5 = 375 lumens
- Therefore, 750 lux on 0.5 m² equals 375 lumens.
- Example 3: Convert 1000 lux over 3 m²
- Multiply: 1000 × 3 = 3000 lumens
- This means 1000 lux on 3 m² is 3000 lumens.
- Example 4: Convert 1200 lux over 1.5 m²
- Calculate: 1200 × 1.5 = 1800 lumens
- So, 1200 lux on 1.5 m² equals 1800 lumens.
Conversion Chart
| Lux (lx) | Lumen (lm) (Assuming 1 m² area) |
|---|---|
| 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 the equivalent lumen values for lux ranging from 1275.0 to 1325.0, assuming the light spreads evenly over one square meter. To use, find the lux value and read the corresponding lumens in the next column.
Related Conversion Questions
- How many lumens are there in 1300 lux over 2 square meters?
- What is the lumen output if 1300 lux illuminates a 0.8 m² surface?
- Does 1300 lux always equal 1300 lumens?
- How to convert 1300 lux to lumen for a 5 m² room?
- What area is assumed when converting 1300 lux to lumen?
- Can 1300 lux be converted to lumens without knowing area?
- Is 1300 lux a high lumen value for indoor lighting?
Conversion Definitions
Lux: Lux is a measurement unit of illuminance which quantifies the amount of visible light that hits or passes through a surface area. One lux equals one lumen per square meter. It indicates how brightly an area is lit, considering the intensity of light spread over that area.
Lumen: Lumen measures luminous flux, representing the total quantity of visible light emitted by a source in all directions per second. It quantifies the light output perceived by the human eye and is used to describe the brightness of light sources regardless of the area illuminated.
Conversion FAQs
Why does the area matter when converting lux to lumens?
Because lux measures light per unit area, the total amount of light (lumens) depends on how large the illuminated surface is. Without knowing the area, converting lux directly to lumens is impossible since lumens describe total light output, not concentration on a surface.
Can I assume 1 square meter area for all lux-to-lumen conversions?
You can only assume 1 m² if the light is evenly spread over exactly that area. Otherwise, if the illuminated surface is larger or smaller, the lumen value changes proportionally. Always consider the actual area to get accurate results.
Is it possible for lumen to be less than lux?
No, because lux is lumens divided by area. If the area is less than 1 m², lumens will be less numerically than lux, but if the area increases, lumens increase accordingly. The values depend on both light intensity and surface size.
Why does the conversion tool multiply lux by 1?
The tool assumes the illuminated area to be 1 square meter, making the conversion direct: lux equals lumens in this case. If you want to convert lux to lumens for different areas, the tool would need an input for area to multiply lux by it.
How does surface reflectance affect lux and lumens?
Surface reflectance affects how much light is absorbed or reflected, changing the lux measurement on that surface. However, lumens measure total emitted light, independent of reflectance. So, reflectance influences lux but not the lumen output of a source.
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